Carrier 40GVC Installation Instructions Manual page 16

Malfunction
System high pressure protection
Anti--- freeze Protection
Discharge temperature sensor malfunction
(out of range)
Low voltage protection
Communication malfunction
System overload protection
Indoor board malfunction
Indoor motor malfunction
Missing jumper from indoor board
Return air temperature sensor malfunction
Indoor pipe temperature sensor malfunction
Outdoor ambient temperature sensor malfunc-
tion
Condenser temperature sensor malfunction
(open or shorted)
Discharge temperature sensor malfunction
(open or shorted)
Overload limit, compressor speed reduction
Over current compressor speed reduction
Compressor discharge temperature high,
compressor speed reduction
Over voltage protection
Current detection malfunction
Compressor current protection
Defrosting
Compressor overload protection
System overload protection
IPM protection
PFC (power factor correction) board protec-
tion
Compressor speed reduction
Ambient temperature cut off range
Compressor start--- up failure
Compressor phase detection error
TROUBLESHOOTING (CONTINUED)
Diagnostic Codes
38/40GVC/Q 18k- -24k, 230v
Error Code
on indoor unit
E1
E2
E4
E5
E6
E8
U8
H6
C5
F1
F2
F3
F4
F5
F6
F8
F9
PH
U5
P5
H1
H3
H4
H5
HC
H7
H0
LC
U1
Repair Method/Cause
Poor heat exchange. Are the coils clogged or blocked? Is the ambi-
ent temperature out of system range?
Outdoor ambient temperature is too low
Measure the resistance value in the sensor
Check incoming power
Check wiring connection
Refer to Service Manual
Replace indoor main board
Check motor mounting and wiring
No jumper on controller or installed improperly or damaged. Corres-
ponding circuit on main board has malfunction.
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Refer to Service Manual
System voltage is too low or system voltage is high
Load is too great
Ambient temperature too high
Refrigerant is low
Electric expansion valve malfunction
Check incoming power supply
Replace outdoor main board
Refer to Service Manual. Check inverter board.
H1 signal normal operation
Check overload wiring
Checked for dirty or blocked heat exchangers
IPM module over temperature, low voltage, silica grease problem
Refer to Service Manual
Check if the resistance of the compressor and the resistance to
ground is normal. If the resistance is normal, the outdoor main
board may be defective.
Refer to Service Manual (overload, high temperature, cutout)
Check if the resistance of the compressor and the resistance to
ground is normal. If the resistance is normal, the outdoor main
board may be defective.
Replace outdoor main board
16