Polycold Cryochiller
Troubleshooting
Installation and Operation Manual
HMI and Observed Errors
Brooks Automation
214072 Revision B
10-7
Temperature Related Troubleshooting
Problem / HMI Display
Possible Cause
Corrective Action
FREEZOUT PREVENTION
Fault LED not lit
Freeze out prevention sensor is
experiencing a temperature
colder than expected.
Check refrigerant
Check freezeout prevention
valve and thermocouple
Contact authorized service
C1 CUST TC FAILED
C2 CUST TC FAILED
Fault LED is Amber
Thermocouple not proper type
Verify that a type T (copper -
constantan thermocouple sen-
sor is being used.
Thermocouple not properly
installed
Check installed polarity of cus-
tomer installed thermocouple
Check TC terminal connection
tightness Torque
Spec is 0.34 N-m (3 lb-in)
Check thermal bonding of sen-
sor to tube.
Thermocouple junction not prop-
erly fabricated
Check TC junction is commer-
cially prepared junction
OR
TC junction is soldered or
welded
TC Junction must NOT be just
twisted wires
HIGH DISCHRG TEMP
REFRIGERANT LEAK
CHECK BALANCE PRES-
SURE
Fault LED Amber
Compressor discharge tempera-
ture is too high
Check cooling water flow
Contact authorized service
REF LQD LINE TEMP
Fault LED is Amber
Cooling water flow and / or
temperature are outside of
acceptable limits.
The system turns off due to
excessively low cooling water
temperature, excessively high
cooling water temperature or
insufficient flow.
Check your temperature and
flow to ensure it is within
acceptable limits.