Interruption of Operation
Page 50
Operating manual LC 340.01-A.3.5/6
Current revision status: Apr 4, 2019
voltage. The chiller control will reboot. Reset of this alarm is not necessary.
8.3 Disruption in operation of the compressor
A qualified person should check the resistance of the motor winding. Please inform our
service department if the measured value differs more than 10%. In this case the
winding of the motor may be defective. The refrigerant module has to be changed.
8.3.1 Technical data for compressor
Resistance of the winding:
2,75
Max. operating current:
A
10.1
Sound pressure level:
dB(A)
60 @ 1 m distance
8.3.2 Troubleshooting
Failure
Reason
Corrective action
Motor protection switch
disconnected sometimes
a) Setting of the motor
protection switch
incorrect.
b) Power supply voltage
sometimes too low or
too high
a) See electrical diagram
for the current of the
motor and make the
right setting
b) Check power supply
voltage
Motor protection switch
disconnects immediately as
soon as the compressor is
switched on
a) Fuses blown
b) Cable loose or
defective
c) Motor winding defective
d) Setting of the motor
protection switch
incorrect
a) Replace fuses
b) Check the terminals for
contact or exchange
cable
c) Replace refrigerant
module
d) See electrical diagram
for the current of the
motor and correct the
setting
The motor did not start
even though the motor
contactor was switched on
a) Supply voltage not
connected
b) Fuses blown
c) Switching contacts or
coil of the contactor
defective
d) Fuses for control
voltage blown
e) Motor defective
a) Connect supply voltage
b) Replace fuses
c) Replace contactor
d) Replace fuses
e) Replace refrigerant
modul.
8.4 Disruption in operation of the pump
A qualified person should check the current of the motor. Please inform our service
department if the measured value differs more than 10%. In this case the winding of
the motor may be defective and the motor must be changed.
