Polycold Cryochiller Troubleshooting
Installation and Operation Manual Remote Monitor Troubleshooting
Brooks Automation
214072 Revision B
10-13
Bit 11
Refrigerant liquid line temp
Fault LED Amber
Warning: Compressor ON
Alarm: Compressor OFF
Refrigerant Liquid Line Tempera-
ture (TC2) multiple conditions
TC2 is between 9C and 12C for
1 min.
Warning L1
TC2 < 9C for 15 min
Alarm L1
TC2 > LINE_TEMP_FAULT_
LIMIT for 2 min
Alarm L1
TC2 > 50C for 1 min
Alarm L1
TC2 > 60C for 30 sec
Alarm L1
Check cooling water flow and
temperature
Bit 12
Refrigerant Liquid Line Temp
(TC2) before and during oper-
ation
Fault LED Amber
Compressor OFF
Cooling water is poor
Before Comp start
TC2 >85C
Comp will not start
After Comp start
TC2 > 85C for 14 seconds, then
Alarm L1 Comp OFF
Water temperature too high.
Check cooling water flow and
temperature
Bit 13
Refrigerant Pressure Switch
Fault LED Red
Compressor OFF
Pressure switch is open
Pressure switch fault
Alarm L1
Check refrigerant pressure
Contact authorized service
Bit 14
Low Refrigerant Suction Pres-
sure
Fault LED Amber
Compressor OFF
PT1 < -17.9kpa (-2.6psi)
Alarm L1
PT1 < -4.13kpa (-0.6psi)
for 5 min
Alarm L1
Low refrigerant pressure
Possible refrigerant leak
Contact authorized service
Bit Mask Value / Problem Possible Cause Corrective Action
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