AERMEC WRC40 - Alarm Codes and Error Explanations

29
Code Function
E1 High pressure
E2 Anti-freeze
E4
High compressor delivery
temperature
E5 Electrical overload
E6
Communication error between indoor
and outdoor unit
E8 High temperature protection
EE Load error from EEPROM
EU
In overtemperature conditions of the
INVERTER power supply module, the
working frequency of the compressor
is limited to avoid damage to the unit
C5
Wrong positioning of the component
jumper cap
F0 Refrigerant leakage
Fo Pump Down mode active
F1
Room air temperature sensor
disconnected or short-circuited
F2
Coil temperature sensor (indoor unit)
disconnected or short-circuited
F3
Outside air temperature sensor
disconnected or short-circuited
F4
Coil temperature sensor (outdoor
unit) disconnected or short-circuited
F5
Discharge sensor disconnected or
short-circuited
F6
In overload conditions, the working
frequency of the compressor is limited
to avoid damage to the unit
F8
In insufficient power supply
conditions, the working frequency
of the compressor is limited to avoid
damage to the unit
F9
In delivery gas overtemperature
conditions, the working frequency
of the compressor is limited to avoid
damage to the unit
FH
In excessively low ambient
temperature conditions, the working
frequency of the compressor is limited
to avoid damage to the unit
PH
Error on continuous voltage
transformer (excessively high value)
PL Board voltage error (direct current)
P0
Compressor test (minimum
frequency)
ALARM CODES
Code Function
P1
Compressor test (operating
frequency)
P2
Compressor test (maximum
frequency)
P3
Compressor test (intermediate
frequency)
P5
Error generated by incorrect power
supply to the compressor
PU
Condenser malfunction on the
outdoor unit board
P7
Malfunction on the outdoor unit
power module
P8
High temperature on the outdoor unit
power module
H3 Compressor overload
H5
Inverter power module protection
High temperature on inverter power
module
H6 Indoor unit fan not working
H7 No compressor synchronisation
HC
Alarm generated by the disturbance
elimination module
L3 Outdoor unit fan not working
L9 Power supply protection
LP
No recognition between indoor and
outdoor units
LC Start-up procedure failed
U1
Alarm generated by the compressor
control card
U3 Unstable power supply
U5
Error in the supply circuit (caused by a
loss of refrigerant gas)
U7
Alarm on 4-way valve on outdoor unit
refrigerant circuit
U9 Error on power card
JF Wi-Fi module error