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5. MAINTENANCE AND INSPECTION
5.2 .Trouble Shooting
COMMON FAILURE CAUSE AND SOLUTION
MALFUNCTION
DISPLAY
CANSE
SOLUTION
Water inlet temp.Sensor failure
P01
The water inlet temp. sensor is open or
short circuit
Check or change thewater inlet temp.
sensor
Water outlet temp.Sensor failure
P02
The water outlet temp. sensor is open or
short circuit
Check or change thewater outlet temp.
sensor
Ambient temp. Sensor failure
P04
The ambient temp. sensor is open or short
circuit
Check or change the ambient temp. sensor
Pipe temp. Sensor failure
P05
The pipe temp. sensor is open or short
circuit
Check or change the pipe temp. sensor
Evaporator temp. Sensor failure
P07
The evaporator temp. sensor is open or
short circuit
Check or change the evaporator temp.
Sensor
High pressure protect
E01
The exhaust pressure is high , high
pressure switch action
Check high pressure switch and cooling
return circuit
Low pressure protect
E02
The suction pressure is low, low pressure
switch action
Check low pressure switch and cooling
return circuit
Flow switch failure
E03
No water or litte water in water system
Check the flow volume, water pump is
failure
Temp. difference between water-inlet and
outlet too high
E06
Water flow volume not enough, water
system pressure difference is small
Check the flow volume, water system is
blocked
Antifreezing under cooling mode
E07
Water flow volume not enough
Check the flow volume. Water system is
blocked
The primary anti-freezing protection start.
E19
Ambient temperature is too low
The second anti-freezing protection start
E29
Ambient temperature is too low
Communication failure
E0B
Communication failure between remote
wire controller and main board
Check the wire connection between remote
wire controller and main board