KeepRite · Air conditioner

74 No 230 V at compressor

High severity KeepRite C4A3/CXA6 ACKeepRite *SA/*SH Single-Stage CommunicatingKeepRite *CA/*CH Two-Stage Communicating

What the control is telling you

The compressor should be starting but no voltage is seen.

Applies to: KeepRite C4A3/CXA6 AC with outdoor control board; *SA5/*SA6 AC and *SH4/*SH5/*SH6 HP single-stage communicating; *CA7/*CA9 AC and *CH6/*CH9 HP two-stage communicating

Likely causes

Disconnect or breaker open
Contactor stuck open
Wiring error

Test and repair steps

Check the disconnect and breaker.
Check the contactor coil gets 24 V and the contacts close.
Check the control box wiring.

Settings for these units

Outdoor unit clearances · KeepRite C4A3/CXA6 AC

Location	Minimum
Service end	24 in. (610 mm)
Above unit	48 in. (1219 mm)
One side	6 in. (152 mm)
Other sides	12 in. (305 mm)
Between units	24 in. (610 mm); 18 in. (457 mm) with no overhang within 12 ft
Roof mount height above roof	6 in. (152 mm)
Shrubs/fences from coil	18 in. (457 mm)

Keep roof run-off and snow from falling on the unit.

Unit must be level within 2 degrees.

Models that show this code

12 models in KeepRite C4A3/CXA6 AC, KeepRite *SA/*SH Single-Stage Communicating, KeepRite *CA/*CH Two-Stage Communicating

*CA624*CA636*CA648*CA660*CA924*CA936*CA948*CA960*SA5*SA6C4A3CXA6

Other codes on the same units

56 Air and coil sensors disagree
71 Low stage thermal cutout
72 Compressor thermal cutout (two-stage: high stage)
73 Contactor stuck closed
81 Low stage thermal lockout
82 Thermal lockout (two-stage: high stage)
83 Low pressure lockout
84 High pressure lockout

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: KeepRite/ICP C4A3/H4A3/T4A3/CXA6 Installation Instructions 421 01 5103 05, Table 1 Status Codes, p.17; KeepRite_ICP_KeepRite_Tempstar_Heil_split_A_C_HP_R_410A_R_22_service_421_08_5400_04.txt - section Table 13 Status Codes (single-stage); KeepRite_ICP_KeepRite_Tempstar_Heil_split_A_C_HP_R_410A_R_22_service_421_08_5400_04.txt - section Table 17 Troubleshooting (two-stage). Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.