7. Troubleshooting
7.1 Error code display on LED wire controller
Error Code
Malfunction
High pressure
EE 01
failure
EE 02
Low pressure failure
EE 03 or
Water flow failure
'ON'
Over heating
protection for water
EE 04
temperature (T2) in
heating mode
Exhaust
EE 05
temperature (T6)
too high protection
Controller
EE 06
malfunction
Compressor current
EE 07
protection
Reason
1. High pressure switch in bad
connection or failure
2. Ambient temperature is too high
3. Water temperature is too high
4. Water flow is too low
5. Fan motor speed is abnormal or
fan motor has damaged
1. Low pressure switch in bad
connection or failure
1. EEV has blocked or pipe system is
jammed
2. Motor speed is abnormal or motor
has damaged
3. Gas leakage
1. Water flow switch is in bad
connection
2. Water flow switch is damaged
3. No/ Insufficient water flow.
1. Low water flow
2. Water flow switch is stuck and the
water supply is cut off
3. T2 sensor is abnormal
1. Lack of gas
2. Low water flow
3. Piping system has been blocked
4. Exhaust temp. Sensor failure
1. Wire connection is not good or
damaged signal wire
2. Controller failure
1. The compressor current is too
large momentary
2. Wrong connection for compressor
phase sequence
26
Solution
1. Check the wiring for high pressure
switch or change a new one
2.Check the water flow or water pump
3. Check the fan motor
4. Check and repair the piping system
1. Check the wiring for low pressure
switch or change a new one
2. Check the EEV and piping system
Check the motor
3. Through the high pressure gauge to
check the pressure value
1. Check the wiring for water flow
switch
2. Change the water flow switch
3. Check the water pump or the
waterway system
1. Check the water way system
2. Check the water pump or water
flow switch
3. Check T2 sensor or change another
one
1. Check the high pressure gauge, if
too low, fill with some gas
2. Check the waterway system and
water pump
3. Check the piping system if there was
any block
4. Change a new exhaust temp. sensor
1. Check and re-connect the signal
wire
2. Change a new signal wire
3. Turn off electricity supply and
restart machine
4. Change a new controller
1. Check the compressor
2. Check the waterway system
3. Check if the power in the normal
range