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Page 60
Alarm
Code
Fault
Possible Cause(s)
Suggested Action(s)
Action By
User
Engineer
F20
IGBT Power Device Error
A transducer has overheated.
Check the current
measurement.
F21
Overload Error
The compressor input current is too high.
Check the operation of the
refrigeration circuit in terms of
gas pressure and charge.
F22
AC Input Over Current Error
The AC input current is too high.
Check the current measurement
and adjust/replace if necessary.
F23
EEPROM Alarm
MCU Error
Replace board.
F24
EEPROM Alarm
MCU Error
Replace board.
F25
LP 15V Error
THE V15V is out of range.
Check the V15V input voltage is
between 12.5V and 16.5V.
F26
IGBT Power Device Over Temperature
The IGBT transducer temperature is too high.
Check the current measurement
and adjust/replace if necessary.
F031
DC Fan Motor 1 Error
There is no connection between the fan module
and motor.
The fan motor is in locked rotor state.
Check the connection between
the fan module and motor.
Replace the fan motor.
F032
DC Fan Motor 2 Error (AS03 models only)
There is no connection between the fan module
and motor.
The fan motor is in locked rotor state.
Check the connection between
the fan module and motor.
Replace the fan motor.
F33
Compressor Current Frequency
Reductiond Error
The Compressor current reading is incorrect/out
of range.
Check the Compressor current
measurement.
Summary of Contents for A Series
Page 36: ...Page 34 Figure 24 AS02 R32 Casing Dimensions Heating Connection Locations FRONT SIDE TOP...
Page 40: ...Page 38 Figure 26 Heating DHW Schematic Figure 27 Heating Only Schematic...
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