Brooks Polycold MaxCool Series - Page 205

Polycold Cryochiller Troubleshooting
Installation and Operation Manual Remote Monitor Troubleshooting
Brooks Automation
214072 Revision B
10-15
Bit 23
Defrost Valve Cycle
Fault LED Amber
Compressor ON
Defrost Valve Cycle Count has
exceeded limit
CIRC_VALV_OPEN_CNT
for Defrost valve >
VALVE_CYCLE_WARN
Alarm L1
Contact authorized service
Bit 24
Freezeout Valve Cycle
Fault LED Amber
Compressor ON
Freezeout Valve Cycle Count
has exceeded limit
CRYO_VALV_OPEN_CNT
for Freezeout valve >
VALVE_CYCLE_WARN
Alarm L1
Contact authorized service
Bit 25 Not used N/A N/A
Bit 26 Not used N/A N/A
Bit 27 Not used N/A N/A
Bit 28
EMO Switch
Fault LED Amber
Compressor OFF
EMO switch is open
Alarm L1
Check EMO switch
Twist EMO switch CW to reset
Bit 29
Cooling Fan
Fault LED not lit
Compressor ON
One or both of the (2) E-Box
cooling fans is disconnected or
has stopped
Warning L2
Check if cooling fans are oper-
ating properly
Check power for cooling fans
Repair power connection or
replace fan(s)
Bit 30
Contactor Chatter
Fault LED not lit
Compressor ON
Compressor Contactor is chat-
tering ON/OFF due to low volt-
age or power issues
Warning L2
Check input power
Check Transformer tap setting
Bit 31
Abusive Comp On/OFF
Fault LED Amber
Compressor ON
Compressor has been turned
ON/OFF 3 times within 1 minute
Alarm L1
Wait one minute to clear before
compressor allowed to start
Bit Mask Value / Problem Possible Cause Corrective Action