Page
12
of
35
3) The electronic expansion valve
assembly blocked
4) Too much refrigerant
5) The switch damaged
6) The uncompressed gas is in
refrigerant system
7) PCB board failure
3) Check and replace the electronic
expansion valve assembly
4) Discharge some refrigerant
5) Replace a high-pressure switch
6) Discharge and then recharge the
refrigerant
7) change the PCB board
3) Procedure 8
4) Procedure 9
5) Procedure 10
6) Procedure 9
7) Procedure 1
Low pressure protection (LP
Switch)
E2
☆☆☆☆☆☆☆
●
(7 flashes 1 dark)
1) Too low air inlet temp
2) The electronic expansion valve
assembly blocked
3) Too less refrigerant
4) The switch damaged
5) The fan assembly cannot work
6 PCB board failure
1) Check if the air inlet temp is over
the working limited
2) Replace the electronic expansion
valve assembly
3) Charge some refrigerant
4) Replace a new low-pressure switch
5) Check if the fan working when the
compressor working. If not, some
problems with the fan assembly
6) change the PCB board
3) Procedure 9
4) Procedure 10
5) Procedure 11
6) Procedure 1
Over heat protection (HTP Switch)
E3
☆☆☆☆☆☆☆☆
●
(8 flashes 1 dark)
1) Too high tank water temp
2) The switch damaged
3) PCB board failure
1) If the tank water temp is over 85C,
the switch will open and the unit will
stop for protection. After the water
comes to normal temp,
2) Replace a new thermal safety
switch
3) Change the PCB board
2) Procedure 12
3) Procedure 1
Solar thermal collector high
temperature protection
E4
☆☆☆☆☆☆☆☆☆☆☆
●
(11flash1 dark)
1) solar water circuit water flow very
little or without water flow
2) Related connecting wires off
3) Water pump failure
4) PCB board failure
1) Solar water circuit fluid infusion
and exhaust
2) Related connecting wires being
reconnected
3) Change the water pump
4) change the PCB board
4) Procedure 1
Water flow failure
E5
☆☆☆☆☆☆☆☆☆
●
(9 flash 1dark)
1) solar water circuit water flow very
little or without water flow
2) Related connecting wires off
3) water pump failure
4) water flow switch failure
5) PCB board failure
1) Solar water circuit fluid infusion and
exhaust
2) Related connecting wires being
reconnected
3) Change the water pump
4) Change the water flow switch
5) Change the PCB board
5) Procedure 1
Defrost
☆☆☆☆☆☆☆☆
……
(all long flashes)
Communication failure
E8
Bright
