50
43
The digital pipe of the
unit displays ER66
Reverse connection of
water inlet and outlet water
temperature sensors
TH6 and TH7 are inserted reversely or
fall off
Check whether TH6 and TH7 are
inserted reversely/fall off
Detection circuit problem of control
module temperature sensor
Replace the control module
44
The digital pipe of the
unit displays ER67
Failure of water inlet
temperature sensor of the
master machine
TH6 Temperature Sensor falls off or is
not inserted well
Check the control module and
insert the temperature sensor
If TH6 Temperature Sensor has short
circuit/open circuit
determine whether the resistance
on both ends of the TH9
Detection circuit problem of control
module temperature sensor
Sensor is normal with the
multimeter/Replace
45
The digital pipe of the
unit displays ER68
Overload failure of Compressor
2 of System 1
The running current of the compressor
is too large. Action of overload
protector
1. According to the circuit
diagram, check whether the
setting value of current of
the corresponding overload
protector is correct
2. Check whether the resistance
of the corresponding
compressor is abnormal.
46
The digital pipe of the
unit displays ER69
Overload failure of Compressor
2 of System 2
The running current of the compressor
is too large. Action of overload
protector
1. According to the circuit
diagram, check whether the
setting value of current of
the corresponding overload
protector is correct
2. Check whether the resistance
of the corresponding
compressor is abnormal.
47
The digital pipe of the
unit displays ER70
Abnormal exhaust temperature
of System 1
The exhaust temperature of
compressor is too high
To Shut down or manually reset to
remove alarm
48
The digital pipe of the
unit displays ER71
Abnormal exhaust temperature
of System 2
The exhaust temperature of
compressor is too high
To Shut down or manually reset to
remove alarm
49
The digital pipe of the
unit displays ERRO
Dialing setting error Dialing setting error on the module
According to the circuit diagram,
complete the dialing setting again
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