8. Trouble shooting
8. 1 Error code display on LED wire controller
Malfunction
Inlet water temperature
sensor failure
Outlet water temperature
sensor failure
Heating
piping
sensor
failure
Gas return sensor failure
Ambient
temperature
sensor failure
Exhaust
piping
sensor
failure
Antifreeze protection in
Winter
Low ambient temperature
protection
Piping
temperature
high
protection
under
cooling mode
T2 water temp. Too low
protection under cooling
mode
High pressure failure
Error
code
1. The sensor in open or short
PP01
circuit
2. The wiring of sensor is loose
1. The sensor in open or short
PP02
circuit
2. The wiring of sensor is loose
1. The sensor in open or short
PP03
circuit
2. The wiring of sensor is loose
1. The sensor in open or short
PP04
circuit
2. The wiring of sensor is loose
1. The sensor in open or short
PP05
circuit
2. The wiring of sensor is loose
1. The sensor in open or short
PP06
circuit
2. The wiring of sensor is loose
Ambient temperature or water inlet
PP07
temperature is too low
1.Beyond the scope of using
PP08
environment
2. Sensor abnormality
1. Ambient temperature is too high
too
or the water temperature is too high
PP10
in cooling mode
2. Refrigeration system is abnormal
1. Low water flow
PP11
2. T2
abnormal
1. Ambient temperature is too high
2. Water temperature is too high
EE01
3. Water flow is too low
Fan motor speed is abnormal, or
fan motor has damaged
Reason
temperature
sensor
- 76 -
Solution
1. Check or change the sensor
2.Re-fix
the
wiring
sensors
1. Check or change the sensor
2.Re-fix
the
wiring
sensors
1. Check or change the sensor
2.Re-fix
the
wiring
sensors
1. Check or change the sensor
2.Re-fix
the
wiring
sensors
1. Check or change the sensor
2.Re-fix
the
wiring
sensors
1. Check or change the sensor
2.Re-fix
the
wiring
sensors
Normal protection
1. Stop using, beyond the
scope of using
2.Change the sensor
1. Check the scope of using
2. Check refrigeration system
1. Check water pump and
waterway system
2. Change T2 temperature
sensor
1. Check the water flow or
water pump
2. Check the fan motor
3. Check and repair the piping
system
of
the
of
the
of
the
of
the
of
the
of
the