Owner`s manual

Check whether the temperature thermistor the connection from
evaporator coil . is loose
Re-connect the thermistor or replace it.
Check whether the compressor discharge temperature thermistor
connection is loose.
Re-connect the thermistor or replace it.
Check whether ambient temperature thermistor connection is
loose.
Re-connect the thermistor or replace it.
Check for lack of water in the system or air in the cycle flow heating
system and discharge it to prevent over heating the water.
Check if the refrigerant is too high and correct it.
Check if the high pressure switch has been damaged, replace it.
Check whether the temperature thermistor connection at the
bottom of the tank is loose.
Re-connect the thermistor or replace it.
EE1
EE2
EE3
EE4
PP5
PP6
PP1
PP2
PP3
Off
On
1 flash 1 off
2 flash 1 off
3 flash 1 off
4 flash 1 off
5 flash 1 off
10 flash 1 off
6 flash 1 off
7 flash 1 off
8flash 1 off
Check for low refrigerant.
Check for damage to the low pressure switch, replace it.
Malfunction and
Protection Name
Fault
code
Motherboard
signal lights
Solution (for technicians)
Bottom of water tank
temp. sensor failure
Not applicable
System coil temp.
sensor failure
Compressor discharge
temp. sensor failure
Not applicable
Ambient temp. sensor
failure
System high pressure
protection
System low pressure
protection
Not applicable
Communication wires disconnected or connection failure.
PP4
EE8
9 flash 1 off
Check for lack of water in the system or air in the cycle flow heating
system and discharge it to prevent over heating the water.
Check for loss of refrigerant in the system.
Defrosting
indication
Continuous
flashing
No flashing
System is running in defrost mode.
Compressor discharge
over temp. protection
or water temp. too high
Communication failure
10. SYSTEM SIGNAL LIGHTS
16
Normal start
Standby
AIR TO WATER ALL IN ONE HEAT PUMP