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E18 followed by a number - driver trip
Display sequence « E18 » / « # »
: Actions to be performed by a qualified technician only
#
Description
Communication fault with
4
master controller
14
Out-of-speed fault
Compressor and PFC key
22
data fault (can not be
cleared
MCU FLASH verification
27
fault (can not be cleared)
3 = PFC Over Current
3 / 9
OR
9 = Power overloading
13
Start up Failure
12
Motor position Loss
2
Compressor Over Current
BLDC1 motor speed is
18
abnormal
Possible causes
Driver is damaged
The Input current is over Limit
Driver is damaged
Compressor load is too high
Compressor is damaged
Compressor cable disconnected
or is not connected properly
The compressor Load is too high
Compressor cable disconnected
or is not connected properly
Compressor is damaged
Check fan motor
Possible solutions
Replace the driver board
Compressor load too high:
- No flow in the heat exchanger: Close by
pass valve if it is open too much
- Evaporator obstructed: Clean it with clear
water
- Expansion valve malfunction: check if
temperatures are normal (ST1 to ST5)
Replace the driver board
Power OFF and then power ON the unit
Measure the winding values
Check wiring of the compressor's phases
Power OFF and then power ON the unit
Check wiring of the compressor's phases
- Measure the winding values
- Check compressor insulation
Replace fan motor if necessary
EN
27
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