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Every number here is counted from the manufacturer's own service documents as read on 2026-09-07. A code counts only when its meaning was verified on the page it cites. "With checks" means the manual's own procedure is on the card. Nothing is authored.

392
manuals read and cited
9,441
codes verified on their page
5,188
with the manual's checks
3,114
symptom-chart rows

ice machines

HoshizakiOpen
Manuals 27Codes 7724 with the manual's checks2 readings786 symptom rows261 maintenance tasks
  • hoshizaki_IM-500SAB-Square-Cube-Service-Manual_service-manual.pdfhoshizaki_IM-500SAB-Square-Cube-Service-Manual_service-manua · 9 codes, 9 with checks, 70 symptom rows
  • KM-MAH-E modular crescent cuberhoshizaki_KM-320-515-650MAH-E-Cuber-Service-Manual_service-m · 6 codes, 3 with checks, 118 symptom rows
  • hoshizaki_KM-Modular-Cuber-Mid-Range-Service-Manual_service-manual.pdfhoshizaki_KM-Modular-Cuber-Mid-Range-Service-Manual_service- · 5 codes, 3 with checks, 120 symptom rows
  • hoshizaki_KMD-460-530-J-Gen-Service-Manual_service-manual.pdfhoshizaki_KMD-460-530-J-Gen-Service-Manual_service-manual.pd · 5 codes, 3 with checks, 115 symptom rows
  • hoshizaki_DCM-300-500-751-752-Dispenser-Service-Manual_service-manual.pdfhoshizaki_DCM-300-500-751-752-Dispenser-Service-Manual_servi · 17 codes, 105 symptom rows
  • hoshizaki_DCM-270BAH-Dispenser-Service-Manual-New_service-manual.pdfhoshizaki_DCM-270BAH-Dispenser-Service-Manual-New_service-ma · 9 codes, 98 symptom rows
  • F / FD modular flaker (H and J/Z auxiliary codes)hoshizaki_F_FD_combined_serv_RND_Chute_service-manual.pdf · 9 codes, 79 symptom rows
  • C-100BAF Self-Contained Cubelethoshizaki_C-100-Cubelet-Service-Manual_service-manual.pdf · 0 codes, 81 symptom rows
  • and 19 more manuals
ManitowocOpen
Manuals 6Codes 125264 symptom rows
  • Indigo Series air/water/remote condenser ice machinesmanitowoc_indigo_awn_sth_mii_en_000014794_wiring-diagram.pdf · 29 codes, 68 symptom rows
  • Indigo NXT air/water/remote condenser ice machinesmanitowoc_000018553_IndigoNXT_AWN_sth_mii_en_web_wiring-diag · 22 codes, 56 symptom rows
  • Indigo NXT R290 refrigerant ice machinesmanitowoc_STH0097_R290_indigoNXT_hb_mii_en_wiring-diagram.pd · 37 codes, 36 symptom rows
  • Indigo NXT QuietQube remote condensing unit ice machinesmanitowoc_000015431_06_IndigoNXT_QuietQube_sth_mii_en_web_wi · 37 codes
  • Indigo Series QuietQube ice machinemanitowoc_Indigo_QuietQube_SM_000014795_service-manual.pdf · 0 codes, 72 symptom rows
  • manitowoc_Indigo_R290_Models_SM_STH038_service-manual.pdfmanitowoc_Indigo_R290_Models_SM_STH038_service-manual.pdf · 0 codes, 32 symptom rows
ScotsmanOpen
Manuals 35Codes 3723 with the manual's checks9 readings1813 symptom rows
  • Prodigy Elite air/water/remote cooled modular cuberscotsman_Prodigy-Elite-MC0322-MC0522-MC0722-Cuber-Service-Ma · 18 codes, 7 with checks, 170 symptom rows
  • scotsman_Prodigy-C0322-C0530-C0722-Modular-Cuber-Service-Manual_service-manual.pdfscotsman_Prodigy-C0322-C0530-C0722-Modular-Cuber-Service-Man · 2 codes, 2 with checks, 170 symptom rows
  • scotsman_Prodigy-Elite-MC0322X-MC0522X-MC0722X-Cuber-Service-Manual_service-manual.pdfscotsman_Prodigy-Elite-MC0322X-MC0522X-MC0722X-Cuber-Service · 0 codes, 170 symptom rows
  • Prodigy Plus A Series modular flake and nugget ice machinesscotsman_Prodigy-Plus-A-Flake-Nugget-AWR-Service-Manual_serv · 3 codes, 2 with checks, 98 symptom rows
  • Prodigy Plus A Series modular flake and nugget ice machines (X models)scotsman_Prodigy-Plus-A-Flake-Nugget-AWRX-Service-Manual_ser · 0 codes, 98 symptom rows
  • HID207 ice maker-dispenser (R290)scotsman_HID207-Dispenser-Service-Manual_service-manual.pdf · 8 codes, 6 with checks, 33 symptom rows
  • Prodigy Plus A Series modular flake and nugget ice machines, water and remote modelsscotsman_Prodigy-Plus-A-FS2330WR-Flake-Nugget-Service-Manual · 0 codes, 78 symptom rows
  • scotsman_Meridian-HID312-HID525-HID540-Dispenser-Service-Manual_service-manual.pdfscotsman_Meridian-HID312-HID525-HID540-Dispenser-Service-Man · 3 codes, 3 with checks, 36 symptom rows
  • and 27 more manuals
Ice-O-MaticOpen
Manuals 3Codes 175 with the manual's checks2 readings
  • iceomatic_GEM-MFI-Nugget-Service-Manual_service-manual.pdficeomatic_GEM-MFI-Nugget-Service-Manual_service-manual.pdf · 7 codes, 4 with checks
  • Elevation Series CIM Modular Cubersiceomatic_CIM_Service_Manual_service-manual.pdf · 7 codes, 1 with checks
  • Elevation Series CIM Modular Cubersiceomatic_CIMTech-Manual2020_service-manual.pdf · 3 codes

VRF and mini-splits

DaikinOpen
Manuals 16Codes 1,218917 with the manual's checks563 readings523 decision charts1 maintenance tasks
  • VRV Aurora RELQ-TA/TB / VRV IV REYQ-TA heat recoverydaikin_SM-RELQ_TB_SiUS371703EE_service-manual.pdf · 94 codes, 77 with checks
  • VRV REYQ-XA heat recoverydaikin_SM-REYQ_XA-(SiUS371901EB)_service-manual.pdf · 91 codes, 74 with checks
  • VRV REYQ-XA / REYQ-XB heat recoverydaikin_sm-reyq_xb_sius371901ee_service-manual.pdf · 93 codes, 74 with checks
  • daikin_sm-reyq_xa-(sius371901e)_service-manual.pdfdaikin_sm-reyq_xa-(sius371901e)_service-manual.pdf · 91 codes, 68 with checks
  • daikin_SM-REYQ_XATJB-SiUS371901ED_wiring-diagram.pdfdaikin_SM-REYQ_XATJB-SiUS371901ED_wiring-diagram.pdf · 91 codes, 74 with checks
  • VRV Emerion REYQ-AA heat recoverydaikin_SiUS372201EB_service.pdf · 92 codes, 65 with checks
  • VRV Aurora RELQ-TA / VRV IV REYQ-TAYCU heat recoverydaikin_sm-relq_ta-reyq_taycu-(sius371703ea)_service-manual.p · 86 codes, 66 with checks
  • daikin_sm-sius342303ea_rxyq_aa_service-manual.pdfdaikin_sm-sius342303ea_rxyq_aa_service-manual.pdf · 88 codes, 67 with checks
  • and 8 more manuals
Mitsubishi ElectricOpen
Manuals 32Codes 1,8471829 with the manual's checks432 readings
  • City Multi PUHY-P (Y)KMU-A / -U heat pumpmitsubishi_M_PUHY-P~T(Y)(S)KMU-A(U)_SERVICE_HWE1115C_2016-04 · 137 codes, 137 with checks
  • City Multi PURY-P (Y)KMU-A / -U heat recoverymitsubishi_HWE1116G_service-2.pdf · 127 codes, 127 with checks
  • City Multi PURY-P (Y)JMU-A heat recoverymitsubishi_M_PURY-P~T(Y)(S)JMU-A_SERVICE_HWE0913A_2013-09_in · 107 codes, 107 with checks
  • City Multi PURY-P Y(T)HMU-A heat recoverymitsubishi_M_PURY-P~T(Y)(S)HMU-A-BS_SERVICE_HWE0803B_2013-09 · 104 codes, 104 with checks
  • City Multi PQHY / PQRY (Y)LMU-A1/A2 water-sourcemitsubishi_M_PQRY_PQHY-A2_SERVICE_install-manual.pdf · 101 codes, 101 with checks
  • City Multi PQHY / PQRY (Y)LMU-A1 water-sourcemitsubishi_M_PQHY_PQRY_T_Y_S_LMU-A1_SERVICE_HWE1414A_05-17_i · 100 codes, 100 with checks
  • City Multi PQHY / PQRY (Y)LMU-A water-sourcemitsubishi_M_PQH(R)Y-P~Y(S)LM-A_SERVICE_HWE14140_2016-04_ins · 100 codes, 100 with checks
  • City Multi PUHY-P (Y)JMU-A heat pumpmitsubishi_HWE09120_service.pdf · 96 codes, 96 with checks
  • and 24 more manuals
LG Multi VOpen
Manuals 5Codes 355194 with the manual's checks44 readings
  • Multi V 5 outdoor units (ARUM series)lg_SM_MultiV_5_OutdoorUnits_service-manual.pdf · 278 codes, 165 with checks
  • Multi V 5 outdoor units (ARUM series)lg_SM_MultiV_5_OutdoorUnits_service-manual.pdf · 72 codes, 24 with checks
  • LGMV inverter scroll chiller troubleshooting guidelg_LGMV_Total_ENG_wiring-diagram.pdf · 2 codes, 2 with checks
  • Multi V i outdoor units (ARUM series, R32)lg_MFL71986707_service-manual.pdf · 2 codes, 2 with checks
  • Multi V III outdoor units (ARUN series, R410A)lg_SM_general_multi-v-iii-208v-heat-pump-unit_mfl54555525_se · 1 code, 1 with checks
Samsung DVMOpen
Manuals 73Codes 108100 with the manual's checks163 readings
  • System Air Conditioner outdoor units (AM series DVM)samsung_Manual_AM_MXWANR_wiring-diagram.pdf · 22 codes, 14 with checks
  • Service Guide E101/C101 -- RAC, CAC, FJM (page 1); DVM, ECO, WATER (page 2)samsung_Service_Guide_E101_C101_Indoor_Unit_Communication_Er · 2 codes, 2 with checks
  • Service Guide E396 -- DVM, CHILLERsamsung_Service_Guide_E396_DC_Link_Sensor_Error_Fan_Controll · 2 codes, 2 with checks
  • Service Guide E466 -- DVM, CHILLERsamsung_Service_Guide_E466_Inverter_PBA_1_DC_Link_Voltage_Er · 2 codes, 2 with checks
  • Service Guide E469 -- DVM, CHILLERsamsung_Service_Guide_E469_Inverter_PBA1_Link_Voltage_Sensin · 2 codes, 2 with checks
  • Service Guide E496 -- DVM, CHILLERsamsung_Service_Guide_E496_DC_Link_Sensor_Error_Fan_Controll · 2 codes, 2 with checks
  • Service Guide E366 -- DVM, CHILLER, WATERsamsung_Service_Guide_E366_Inverter2_DC_Link_Voltage_Error_w · 2 codes, 2 with checks
  • Service Guide E464 -- DVM, CHILLER, WATER (pages 1-3); RAC, CAC, FJM (pages 4-5)samsung_Service_Guide_E464_Overcurrent_On_Compressor1_Error_ · 2 codes, 2 with checks
  • and 65 more manuals
Fujitsu GeneralOpen
Manuals 1Codes 140140 with the manual's checks39 readings
  • Airstage VU-V VRF outdoor unitsfujitsu_Airstage-VRF-Service-Manual_service-manual.pdf · 140 codes, 140 with checks
Fujitsu AirstageOpen
Manuals 1Codes 32
  • Airstage VU-V VRF outdoor unitsfujitsu_Airstage-VRF-Service-Manual_service-manual.pdf · 32 codes
Gree VRFOpen
Manuals 3Codes 276
  • Ultra Heat GMV6 Mini DC Inverter VRF (Nh high-capacity line)gree_gmv6-r32-ultra-heat-pump-service-manual_service-manual. · 255 codes
  • GMV5 Multi Variable Air Conditioner indoor units (all types)gree_gmv5-indoor-units-service-manual_service-manual.pdf · 19 codes
  • Ultra Heat GMV6 Mini DC Inverter VRF, 208-230Vgree_gmv6-ultra-heat-mini-heat-pump-208-230v-service-manual_ · 2 codes
GreeOpen
Manuals 8Codes 856 with the manual's checks2 readings26 maintenance tasks
  • Livo Gen3 outdoor unit, 9k-24k 230Vgree_livo-gen3-service-manual-9k-24k-230v-a_service-manual.p · 19 codes, 6 with checks
  • One-way Cassette Type Indoor Unitgree_1-way-cassette-user-manual_wiring-diagram.pdf · 0 codes
  • Fresh Air Series Indoor Unitgree_100-fresh-air-processing-unit-user-manual_wiring-diagra · 0 codes
  • Two-way Cassette Type Indoor Unitgree_2-way-cassette-user-manual_wiring-diagram.pdf · 0 codes
  • Multi-positional GMV Dual Fuel A-coil Indoor Unitsgree_gmv-duel-fuel-a-coil-owner-s-manual_wiring-diagram.pdf · 0 codes
  • Cassette B Series ceiling cassettegree_ceiling-cassette-service-manual-manual-b_service-manual · 1 code
  • Livo Gen3 high-wall ductless systemgree_livo-gen3-installation-instructions-a_install-manual.pd · 12 codes
  • Multi Eco R32 outdoor unitgree_multi-eco-r32-service-manual-a_service-manual.pdf · 53 codes
Toshiba CarrierOpen
Manuals 1Codes 2424 with the manual's checks2 readings
  • Toshiba Carrier Super Modular Multi (e) VRF heat pump outdoor unitstoshiba-carrier_SVM-16062_service-manual.pdf · 24 codes, 24 with checks
CarrierOpen
Manuals 28Codes 1,594720 with the manual's checks137 readings
  • AquaEdge 19DV two-stage centrifugal liquid chiller (PIC6)carrier_19DV-CLT-5T_unknown.pdf · 211 codes, 187 with checks
  • EVERGREEN 23XRV variable-speed screw chiller (Foxfire, PIC III)carrier_User-Manual-Carrier-23XRV_iom.pdf · 197 codes, 197 with checks
  • SmartVu control for 30XA/XB/XW AquaForce PUREtec chillerscarrier_10509_CONTROL_07_2024_30XAXBXBE(ZE)XBP(ZE)XWXWP(ZE)_ · 220 codes, 67 with checks
  • Toshiba Carrier Super Modular Multi (e) VRF heat pump outdoor unitstoshiba-carrier_SVM-16062_service-manual.pdf · 81 codes, 81 with checks
  • AquaForce 30XV140-325 variable speed air-cooled chillers (Greenspeed, Touch Pilot)carrier_30XV-1T_unknown.pdf · 68 codes, 68 with checks
  • WeatherMaker 48/50A020-060 rooftop unitscarrier_48-50A-14T_unknown.pdf · 121 codes, 23 with checks
  • Infinity 25VNA8 / 24VNA9 variable-speed heat pump and air conditionercarrier_25VNA8-24VNA9-4SM_service-manual.pdf · 39 codes, 32 with checks
  • Weathermaster 48/50P030-100 rooftop unitscarrier_48-50P-9T_unknown.pdf · 95 codes, 7 with checks
  • and 20 more manuals
Mitsubishi ResidentialOpen
Manuals 6Codes 4931 with the manual's checks3 readings
  • M-Series MUZ-FX NLHZ outdoor units (R454B)mitsubishi_r454b-OBH946C_unknown.pdf · 18 codes, 18 with checks
  • M-Series MFZ-KX NL floor-standing indoor units (R454B)mitsubishi_r454b-OBH944B_service.pdf · 8 codes, 8 with checks
  • M-Series MSZ-FX NL wall-mounted indoor units (R454B)mitsubishi_r454b-OBH945B_service.pdf · 4 codes, 4 with checks
  • P-Series PUZ-A / PUY-A NKA8/NHA8 outdoor units (R410A)mitsubishi_OCH764B_service-manual.pdf · 8 codes, 1 with checks
  • M-Series MXZ-SM outdoor multi-zone unitsmitsubishi_OCH819D_service-manual.pdf · 9 codes
  • SEZ Series ceiling-concealed indoor units (R454B)mitsubishi_HWE24090_service.pdf · 2 codes
MRCOOLOpen
Manuals 3Codes 2714 with the manual's checks
  • Advantage Series split systemmrcool_mc-adv-5-im-en-01_install-manual.pdf · 13 codes, 13 with checks
  • DIY Series multi-zone mini-split systemmrcool_mc-diy-5-mz-im-um-en-01_install-manual.pdf · 1 code, 1 with checks
  • Universal Series split systemmrcool_mc-uni-5-im-um-en_install-manual.pdf · 13 codes
HitachiOpen
Manuals 5Codes 65
  • Split Unit Inverter Air Conditioner (generic system overview)hitachi_65MP3199_01_install-manual.pdf · 16 codes
  • Set Free air365 outdoor units, Universal heat pump and heat recoveryhitachi_A16381E84N-rev.1,_December_wiring-diagram.pdf · 17 codes
  • Inverter-driven multi-split system outdoor unitshitachi_66MP1373_01_install-manual.pdf · 14 codes
  • Set Free air365 outdoor units, Heat Pump and Heat Recoveryhitachi_A16381Z84L-rev.1,_December_wiring-diagram.pdf · 9 codes
  • Hitachi package products, system information (generic)hitachi_PMEN0553_rev2_03-22_operation-manual.pdf · 9 codes

water heaters and boilers

Bradford WhiteOpen
Manuals 16Codes 351275 with the manual's checks21 readings
  • Infiniti K/L Series tankless (condensing) gas water heaterbradfordwhite_238-53328-00_Current_service-manual.pdf · 40 codes, 38 with checks
  • Infiniti GS Series wall-mounted modulating gas condensing tanklessbradfordwhite_238-54627-00_Current_wiring-diagram.pdf · 30 codes, 30 with checks
  • RTG 199 HE indoor tankless (temperature modulated)bradfordwhite_238-50793-00_B_wiring-diagram.pdf · 29 codes, 29 with checks
  • Flammable Vapor Ignition Resistant direct vent water heaters (Defender Safety System)bradfordwhite_238-51636-00_Current_service-manual.pdf · 24 codes, 24 with checks
  • High EF atmospheric vent gas water heater (Defender Safety System)bradfordwhite_238-51617-00_Current_service-manual.pdf · 18 codes, 18 with checks
  • Flammable Vapor Ignition Resistant water heaters (Defender Safety System)bradfordwhite_238-51542-00_Current_service-manual.pdf · 17 codes, 17 with checks
  • KwickShot tankless electric water heatersbradfordwhite_238-54367-00_Current_install-manual.pdf · 16 codes, 14 with checks
  • EverHot condensing tankless gas water heater (interior)bradfordwhite_238-48793-00_C_parts-manual.pdf · 17 codes, 17 with checks
  • and 8 more manuals
Bradford White TanklessOpen
Manuals 2Codes 5858 with the manual's checks20 readings
  • Infiniti Tankless K-Series (outdoor)bradfordwhite-tankless_6-720-813-642_Current_wiring-diagram. · 41 codes, 41 with checks
  • EverHot condensing tankless gas water heater (interior)bradfordwhite_238-48793-00_C_parts-manual.pdf · 17 codes, 17 with checks
Bradford White AeroThermOpen
Manuals 1Codes 27
  • AeroTherm heat pump water heater (RE2H)bradfordwhite_238-52169-00_Current_parts-manual.pdf · 27 codes
RinnaiOpen
Manuals 7Codes 144140 with the manual's checks49 readings
  • I-SERIES Plus boiler diagnostic codesrinnai_800000375-Troubleshooting-I-Series-Plus-Diagnostic-Co · 42 codes, 40 with checks
  • REHP Series electric heat pump water heaterrinnai_100000867(04)-Electric-Heat-Pump-Water-Heater-Manual- · 23 codes, 23 with checks
  • Demand Duo R-Series (REC) automatic circulating tank water heaterrinnai_100000808-Demand-Duo-R-Series-(REC)-Installation-and- · 24 codes, 24 with checks
  • M-Series condensing combi boilerrinnai_800000063(01)-M-Series-Condensing-Combi-Boiler-Instal · 18 codes, 18 with checks
  • Direct vent tankless water heater (RL/RLX i/e Series)rinnai_100000244-VC-Installation-and-Operation-Manual_wiring · 18 codes, 18 with checks
  • Demand Duo R-Series automatic circulating tank water heaterrinnai_100000675(01)-Demand-Duo-R-Series-Installation-and-Op · 17 codes, 16 with checks
  • Rinnai Commercial Boiler (Solo)rinnai_800000240-Rinnai-Commercial-Boiler-Floor-Installation · 2 codes, 1 with checks
Rinnai TanklessOpen
Manuals 1Codes 2525 with the manual's checks1 readings
  • Sensei N-Series residential condensing tankless water heaterrinnai_100000467-N-Series-Residential-Condensing-Installatio · 25 codes, 25 with checks
Rinnai BoilersOpen
Manuals 1Codes 4442 with the manual's checks47 readings
  • I-SERIES Plus boiler diagnostic codesrinnai_800000375-Troubleshooting-I-Series-Plus-Diagnostic-Co · 44 codes, 42 with checks
Rinnai Heat Pump Water HeatersOpen
Manuals 1Codes 1616 with the manual's checks
  • REHP Series electric heat pump water heaterrinnai_100000867(04)-Electric-Heat-Pump-Water-Heater-Manual- · 16 codes, 16 with checks
A. O. SmithOpen
Manuals 8Codes 138100 with the manual's checks40 readings
  • High-Efficiency Commercial gas water heater (Flex/HLW)aosmith_100394452_wiring-diagram.pdf · 34 codes, 33 with checks
  • Burkay gas-fired commercial copper boileraosmith_100077928_wiring-diagram.pdf · 27 codes, 19 with checks
  • Commercial electric heat pump water heateraosmith_100364933_wiring-diagram.pdf · 18 codes, 18 with checks
  • Commercial gas water heater, Power Vented with Hot Surface Ignitionaosmith_100282340_parts-manual.pdf · 13 codes, 13 with checks
  • Commercial gas water heater, Power Direct Vent with Hot Surface Ignition (BPD)aosmith_331603_wiring-diagram.pdf · 17 codes, 12 with checks
  • Genesis commercial gas water heater/boileraosmith_2000005371_service-manual.pdf · 14 codes, 5 with checks
  • Commercial gas water heater (BTR, MasterFit)aosmith_318230_wiring-diagram.pdf · 9 codes
  • Commercial gas water heater, Ultra Low NOx Series 200 (BTL)aosmith_327502_wiring-diagram.pdf · 6 codes
A. O. Smith VoltexOpen
Manuals 1Codes 2323 with the manual's checks3 readings
  • Voltex hybrid electric heat pump water heateraosmith_100379654_wiring-diagram.pdf · 23 codes, 23 with checks
RheemOpen
Manuals 2Codes 4646 with the manual's checks14 readings
  • Electric Residential Hybrid water heater (heat pump)rheem_38C86878-9974-4171-B553-B85163859EFC_wiring-diagram.pd · 40 codes, 40 with checks
  • Electric Residential water heaters with Electronic Controlrheem_2DBFCD91-3EBD-4C08-BD0A-2FA67C7A8D07_wiring-diagram.pd · 6 codes, 6 with checks
Rheem ProTerraOpen
Manuals 1Codes 4040 with the manual's checks14 readings
  • ProTerra hybrid electric heat pump water heaterrheem_38C86878-9974-4171-B553-B85163859EFC_wiring-diagram.pd · 40 codes, 40 with checks

rooftops, chillers and applied

TraneOpen
Manuals 33Codes 1,047109 with the manual's checks25 readings251 symptom rows
  • IntelliPak Commercial Self-Contained Modular Seriestrane_SCXG-SVX01B-EN_IntelliPak_SelfContained_service.pdf · 51 codes, 30 with checks
  • trane-ACC-APG002.pdftrane-ACC-APG002.pdf · 132 codes, 15 with checks
  • Ascend ACR Series C air-cooled chillertrane_AC-SVX003E-EN_iom.pdf · 173 codes
  • Modular Self-Contained SCWM (R-454B)trane_PKG-SVX030B-EN_wiring-diagram.pdf · 43 codes, 23 with checks
  • Symbio 700 Controller (for Voyager 3 packaged rooftop air conditioners)trane_BAS-APG048C-EN_wiring-diagram.pdf · 71 codes
  • trane-ACC-APG004.pdftrane-ACC-APG004.pdf · 55 codes, 3 with checks
  • trane_PART-SVX007A-EN_service-manual.pdftrane_PART-SVX007A-EN_service-manual.pdf · 18 codes, 7 with checks, 25 symptom rows
  • Horizon Outdoor Air Unit (water source heat pump)trane_OAU-SVX004G-EN_wiring-diagram.pdf · 37 codes, 1 with checks
  • and 25 more manuals
Daikin AppliedOpen
Manuals 18Codes 51075 with the manual's checks33 readings
  • MicroTech Unit Controller manual for Rebel commercial packaged rooftop systems (model DPS)daikin-applied_OM-1382-2_pub-12-30-2025_wiring-diagram.pdf · 75 codes, 53 with checks
  • Trailblazer air-to-water scroll heat pump (model EWYQ, EWYT)daikin-applied_IOM1358-1_iom.pdf · 12 codes, 12 with checks
  • SmartSource large capacity vertical water source heat pump (model WSLV)daikin-applied_IM-1375-1-smart-source-wshp-vertical_wiring-d · 14 codes, 7 with checks
  • Centrifugal chillers WSC / HSC / TSCdaikin-applied_IOM1274-3_iom.pdf · 20 codes, 2 with checks
  • Pathfinder AWV air-cooled screw chillersdaikin-applied_IOM1242-11_iom.pdf · 27 codes
  • MicroTech Controller manual for PreciseLine light air handlersdaikin-applied_OM-1357-5_wiring-diagram.pdf · 38 codes
  • Magnitude WMT magnetic bearing oil-free centrifugal chillersdaikin-applied_IOM1297-1_iom.pdf · 1 code, 1 with checks
  • MicroTech Unit Controller manual for Rebel Applied rooftop systems (model DPSA, DHSA, DAHA)daikin-applied_OM-1373-2-042326_wiring-diagram.pdf · 16 codes
  • and 10 more manuals
York / JCIOpen
Manuals 20Codes 16463 with the manual's checks4 readings39 maintenance tasks
  • JHC Premium Variable Speed ECM single piece multi-position air handlersyork-jci_jhc_installguide_installation.pdf · 27 codes, 27 with checks
  • HH8 Series 18 SEER2 horizontal discharge multi-speed heat pumpyork-jci_hh8_installguide_installation.pdf · 20 codes, 20 with checks
  • YMAE air-cooled inverter scroll chiller and heat pumpyork-jci_150.89-ICOM1_wiring-diagram.pdf · 64 codes
  • CTF/CTM/CTU full-cased and uncased coils for cooling and heat pumpsyork-jci_ctf_installguide_installation.pdf · 9 codes, 9 with checks
  • JMC Series variable speed ECM modular multi-position air handlersyork-jci_jmc_installguide_installation.pdf · 6 codes, 6 with checks
  • YLAA air-cooled scroll chillers with brazed plate heat exchanger, Style Byork-jci_150.72-ICOM6_wiring-diagram.pdf · 19 codes
  • JSE Standard ECM single-piece upflow air handlersyork-jci_jse_installguide_installation.pdf · 7 codes
  • JHE Standard ECM single-piece multi-position air handlersyork-jci_jhe_installguide_installation.pdf · 1 code, 1 with checks
  • and 12 more manuals
AaonOpen
Manuals 2Codes 203 with the manual's checks
  • AAON RN Series packaged rooftop units (R-410A), 6-30 tonaaon_RN_IOM_240826_410a_iom-2.pdf · 14 codes, 3 with checks
  • AAON RN Series packaged rooftop units, heat pumps, & outdoor air handling units (R-454B), 6-70 tonaaon_RN-Series-IOM-20251210_iom-2.pdf · 6 codes
Lennox ResidentialOpen
Manuals 1Codes 146
  • Lennox Smart Thermostat communicating-system alert codeslennox_LENNOX-RESIDENTIAL-COMMUNICATING-SYSTEMS_wiring-diagr · 146 codes
BardOpen
Manuals 1Codes 41 with the manual's checks
  • 11EER WA Series Wall Mount Air Conditionerbard_2100-803(C)_install-manual.pdf · 4 codes, 1 with checks
ClimateMasterOpen
Manuals 1Codes 1411 with the manual's checks
  • DXM2.5 Digital Heat Pump Controller (Advanced Communicating Controls)climatemaster_DXM2.5-ADVANCED-COMMUNICATING-CONTROLS_wiring- · 14 codes, 11 with checks
EubankOpen
Manuals 1Codes 5
  • 11+ EER Vertical Packaged Wall Mount Air Conditionerseubank_Eubank-EAA1020A-1060A-EGA1072A-Wall-Mount-AC_product- · 5 codes

refrigeration, drives and controls

CopelandOpen
Manuals 3Codes 3931 with the manual's checks2 readings
  • CoreSense Communications for 20 to 40 Ton Copeland Scroll air conditioning compressorscopeland_AE-1384-R6-CoreSense-Communications-for-20-to-40-To · 12 codes, 11 with checks
  • Comfort Alert Commercial Diagnostics modulecopeland_2005ECT-191-R6-User-Manual-Comfort-Alert-for-Commer · 11 codes, 10 with checks
  • CoreSense Communications for 13 to 15 Ton Copeland Scroll air conditioning compressorscopeland_AE-1408-R2-CoreSense-Communications-for-13-to-15-To · 16 codes, 10 with checks
HeatcraftOpen
Manuals 3Codes 1311 with the manual's checks4 readings
  • intelliGen Refrigeration Controller (iRC)heatcraft_intelliGen-IWRC-IOM_iom.pdf · 9 codes, 9 with checks
  • Condensing Units Installation and Operations Manualheatcraft_H-IM-CU_wiring-diagram.pdf · 3 codes, 2 with checks
  • intelliGen Integration Card (iIC) for BAS integrationheatcraft_intelliGen-iIC-IOM_iom.pdf · 1 code
Nor-LakeOpen
Manuals 1Codes 6724 with the manual's checks16 readings
  • LogiTemp Electronic Controller System for Split Pak A2L refrigeration systemsnorlake_LogiTemp-Split-Pak-A2L-Manual_wiring-diagram.pdf · 67 codes, 24 with checks
Baltimore AircoilOpen
Manuals 2Codes 6059 with the manual's checks1 readings
  • TrilliumSeries Adiabatic Cooler - TRFbac_RGOMTRF303_R5.0_parts-manual.pdf · 34 codes, 34 with checks
  • Vertex Evaporative Condenserbac_RGOMVRCA01_20250529_0_parts-manual.pdf · 26 codes, 25 with checks
VertivOpen
Manuals 10Codes 342286 maintenance tasks
  • Liebert XDU070 coolant distribution unit (liquid to air)vertiv_liebert-xdu070-operating-and-maintenance-guide-sl-711 · 50 codes
  • CoolChip CDU 121 coolant distribution unitvertiv_80278-cdu-121-operation-maintenance-reva-10-25-locked · 38 codes
  • CoolChip CDU 600 coolant distribution unitvertiv_coolchip-cdu-600-operation-and-maintenance-guide-sl-0 · 35 codes
  • CoolChip CDU100kW coolant distribution unitvertiv_coolchip-cdu100-operation-and-maintenance-manual-sl-7 · 19 codes
  • CoolChip CDU070 coolant distribution unit (liquid to air)vertiv_coolchip-cdu-70-operation-and-maintenance-guide-sl-80 · 7 codes
  • Liebert XDU1350 coolant distribution unitvertiv_70619-xdu1350-operation-and-maintenance-manual-rev-b_ · 53 codes
  • Liebert XDU450 coolant distribution unitvertiv_liebert-xdu450-coolant-distribution-unit-operation-an · 0 codes
  • Liebert XDU1350 coolant distribution unitvertiv_liebert-xdu1350-coolant-distribution-unit-operation-a · 54 codes
  • and 2 more manuals
ABB DrivesOpen
Manuals 1Codes 03 maintenance tasks
  • ACH550 HVAC drive, 1-550 hp (full User's Manual)abb-drives_ABB-ACS580-User-Manual-3AUA0000081823-RevF_wiring · 0 codes
Danfoss DrivesOpen
Manuals 1Codes 229 with the manual's checks
  • VLT HVAC Drive FC 102danfoss_VLT-FC102-HVAC-Drive-Operating-Instructions_wiring-d · 22 codes, 9 with checks

A manual listed with codes and no checks is one whose maker prints a code list and no procedure for it; the card says so rather than filling the gap. Where a manual prints its troubleshooting by symptom instead of by code, it appears under the brand's "Start from a symptom" entry.