Troubleshooting Polycold Cryochiller
HMI and Observed Errors Installation and Operation Manual
Brooks Automation
10-4
214072 Revision B
Compressor Motor Troubleshooting
Troubleshooting the compressor motor requires that the Polycold Cryochiller is fully booted up.
Problem / HMI Display Possible Cause Corrective Action
Compressor will not start
No LEDs lit
Compressor switch is off
Compressor switch must be on
for compressor to run.
Set compressor switch to ON.
Compressor will not start
No LEDs lit
Compressor switch is on.
Compressor contactor circuit
needs to be reset after power up.
Turn compressor switch OFF
and then ON
Remote EMO connector or J11
bypass is disconnected
Connect remote EMO cable or
install J11 EMO Jumper
Remote EMO signal open at
remote device
Check continuity on pins 3 and
4 on remote EMO connector.
Correct remote EMO condition.
Remote EMO wiring insufficient
Must be 16AWG and less than
15M (50 feet).
Check EMO wiring for 16AWG
Correct wiring as required.
Supply voltage too low Check voltage and correct
Compressor will not start
Fault LED flashing
Compressor contactor circuit
needs resetting
Press Reset switch
A Fault that opens the compres-
sor contactor is active
Determine what fault is active
and resolve the issue.
Contact authorized service if
fault continues
Compressor will not start
Fault LED flashing
Compressor pressure switch
PS1 is open indicating high dis-
charge pressure
Wait for pressure to come down
below the threshold level.
Contact authorized service if
high pressure continues
Compressor thermal cutout
switch is open
Wait for compressor motor to
cool.
Contact authorized service if
over heating continues
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