AUX ALCA-HA Series Installation And Owner's Manual page 95

ERROR CODES
Low pressure switch
H4
E1 4 way valve protection
DC inverter discharge
E3
high shutdown
protection
Coil Center temperature
E8
shutdown protection
The communication
J2 between outdoor unit
and indoor unit failure
The communication
J3 between PCB and INV
module failure
DESCRIPTION
high
95
RECOVERY OR PROBLEM POSSIBLE
NOT
System pressure lower
than low pressure switch
Low pressure switch failure
Instantaneous power-off
In cooling mode indoor unit
YES
In heating mode outdoor
unit EXV close or block
In heating mode outdoor
In heating mode outdoor
YES
Outdoor unit PCB failure
System less refrigerant
DC inverter compressor
Compressor air return filtre
EXV open degree is samall
NO
Gas pipe stop valve closed
System exhaust sensor
Outdoor unit PCB failure
System over refrigerant
EXV open degree is small
YES
System exhaust sensor
Outdoor unit PCB failure
The communication wire
disconnected, short circuit
YES
or Connected incorrectly
Indoor unit power main
The connection between
driving module and main
The communication part of
outdoor unit control PCB
YES
Frequency driving board
REASONS
limit
Stop valve closed
EXV close or block
unit fan stop
unit air outlet block
4 way valve block
failure
block
or EXV block
Liquid pipe stop valve
closed
failure
or EXV block
failure
between indoor and
outdoor units
PCB failure
PCB failure
failure
failure
Compressor failure