Troubleshooting From Outdoor Unit - Carrier 38VMH-1P Service Manual

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Troubleshooting from Outdoor Unit

Error Code
E2 Communication error between indoor units and outdoor unit
E4 Temperature sensor (T3 or T4) error
E5 Power voltage protection
E6 DC fan error
E7 Discharge temperature sensor (T5) error
E9 EEPROM error
E.9. Mismatched main chip with EEPROM
EA DC fans stay at zone A for more than five minutes (i.e. the low pressure is too high) in heating mode
Eb E6 error more than two times in ten minutes
P1 High pressure protection
P2 Low pressure protection
P3 Input current overload protection
P4 Discharge temperature (T5) protection
P5 Condenser temperature (T3) protection
P8 Fan speed exceeds setpoint for five seconds or more
PE High indoor coil temperature (T2A) protection
PP Liquid slugging protection; indoor evaporator super heat too low
F1 DC bus voltage is too low (< 200V DC) for five seconds
H0 Communication error between power driver and main control board
H4 L0 or L1 error more than three times in 60 minutes
L0 Error in compressor module
L1 DC bus under-voltage protection
L2 DC bus over-voltage protection
L4 Compressor MCE error
L8 Compressor speed difference is more than 15 rps in one second
L9 Compressor speed difference between setting speed and running speed is more than 15 rps
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
CAUTION
Be sure to turn off power switch before connecting or
disconnecting the connector. Failure to do so could damage
the board.
Table 35 —Error Code of Outdoor Unit
Definition
36