Carrier 40GVQ Installation Instructions

17
TROUBLESHOOTING (CONTINUED)
Diagnostic Codes
38/40GVC/Q 30k--36k, 230v
Malfunction
Error Code
on indoor unit
Repair Method/Cause
Defrosting H1 H1 signal normal operation
Anti--- freeze Protection E2 Outdoor ambient temperature is too low
IPM protection H5 IPM module over temperature, low voltage, silica grease problem
Low voltage protection E5 Check incoming power
System overload protection H4 Checked for dirty or blocked heat exchangers
Discharge temperature sensor malfunction
(out of range)
E4 Measure the resistance value in the sensor
Compressor overload protection H3 Check overload wiring, compressor shell overheat, low charge
Compressor high voltage/power protection L9 Compressor voltage too high, ambient temperature out of range
IPM protection H5 IPM module over temperature, low voltage, silica grease problem
Indoor PCB Malfunction EE Replace main indoor board
DC input voltage is too low PL Check incoming power supply
DC input voltage is too high PH Check incoming power supply
PFC (power factor correction) board protec-
tion
HC Refer to Service Manual
Indoor motor malfunction H6 Check motor mounting and wiring
Indoor and outdoor units mismatched LP Check system combination
Condenser temperature sensor malfunction
(open or shorted)
F4 Measure the resistance value in the sensor
Outdoor ambient temperature sensor
malfunction
F3 Measure the resistance value in the sensor
Discharge temperature sensor malfunction
(open or shorted)
F5 Measure the resistance value in the sensor
Return air temperature sensor malfunction F1 Measure the resistance value in the sensor
Indoor pipe temperature sensor malfunction F2 Measure the resistance value in the sensor
Communication malfunction E6 Check wiring connection
Missing jumper from indoor board C5
No jumper on controller or installed improperly or damaged. Corres-
ponding circuit on main board has malfunction.
System high pressure protection E1
Poor heat exchange. Are the coils clogged or blocked? Is the ambi-
ent temperature out of system range?

Carrier 40GVQ Specifications

General

Brand	Carrier
Model	40GVQ
Category	Air Conditioner
Language	English