Bering BEXP20i - Page 44

40
Malfunction
Error code
Reason
Solution
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. Enter correct program
Current detection circuit
failure
EE22
1. Voltage signal abnormal
2. Driver board is damaged
1.
Check the main board or
change a new one
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
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
connected to one phase or two
phases.
Check the actual wiring according
to the circuit diagram
Four-way valve reversal
failure
EE26
1.
Four-way valve reversal failure
2. Lack of refrigerant (no detect
when T3-TH2 or T5-TH1
malfunction)
1. Switch to Cooling mode to
check the 4-way valve if it has been
reversed correctly
2. Change a new 4-way valve
3. Fill with gas
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. Turn off electricity supply and
restart it
2. Change a new main board