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Service Manual VMH SerieS Heat Controller, Inc.
9.2 Outdoor unit error code explanation:
Outdoor
Error
Code:
LED STATUS
Corresponding Indoor
Mini-Split error code
E0 Outdoor EEPROM malfunction E5
E1
Indoor unit A’s
coil outlet temp. sensor or connector of
sensor is defective
E5
E2
Indoor unit B’s coil outlet temp. sensor or connector of
sensor is defective
E5
E3
Indoor unit C’s coil outlet temp. senso
r or connector of
sensor is defective
E5
E6
Indoor unit D’s
coil outlet temp. sensor or connector of
sensor is defective
E5
E4 Open or short circuit of outdoor unit temperature sensor E5
E5 Voltage protection P1
E7
Communication malfunction between IPM
board and
outdoor main board
P4
P0
Temperature protection of compressor discharge or
compressor top.
For A-VMH-36QC-1 it means
Temperature protection of
compressor discharge
P2
P1 High pressure protection (Only for A-VMH-36QC-1) P2
P2 Low pressure protection (Only for A-VMH-36QC-1) P2
P3 Current protection of compressor ——
P4 IPM module protection P0
P6 High temperature protection of condenser ——
P7 Inverter compressor drive protection P4
PF PFC module protection (A-VMH36QC-1) ——