GRE HPGI50, Owner'S Manual

Page: 77 / 282

75
Malfunction Error
code
Reason Solution
PFC module high
temperature protection
EE19
1. PFC module thermal circuit output
abnormal
2. Fan motor is abnormal or damaged
3. Fan blade is broken
4. The screw in the driver board is not
tight
1. Check the main board or replace the
driver board
2. Check if the motor speed is too low
or fan motor is damaged, replace it by a
new one if any failure.
3. Change the fan blade if it is broken
4. Check the screw on driver board
Input power failure EE20 The supply voltage fluctuates too much Check whether the voltage is stable
Software control
exception
EE21
1. Compressor runs out of step
2. Wrong program
3. Impurity inside compressor causes the
unstable rotate speed 1. Check the main board or change a
new one
2. Update the correct program
3. Check the refrigeration system
Current detection
circuit failure
EE22
1. Voltage signal abnormal
2. Driver board is damaged
3. Main board failure
1. Change a new main board
2. Change a new driver board
Compressor start
failure
EE23
1. Main board is damaged
2. Compressor wiring error or poor
contact or unconnected
3. Liquid accumulation inside
4. Wrong phase connection for
compressor 1. Check the main board or change a
new one
2. Check the compressor wiring
according to the circuit diagram
3. Check the compressor or change a
new one
Ambient Temperature
device failure on Driver
board
EE24 Ambient Temperature device failure Change driver board or main board
Compressor phase
failure
EE25
Compressors U, V, W are just connected to
one phase or two phases. Check the actual wiring according to the
circuit diagram
EEPROM data read
malfunction
EE27
1. Wrong EEPROM data in the program or
failed input of EEPROM data
2. Main board failure
1. Re-enter correct EEPROM data
2. Change a new main board
The inter-chip
communication failure
on the main control
board
EE28 Main board failure
1. Stop electricity supply and restart it
2. Change a new main board