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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22120
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have a mc quay air cooled chiller model no. ALS080AS12 locking

Customer Question

i have a mc quay air cooled chiller model no. ALS080AS12 locking out on motor protection and high pressure alarms intermittently. I have seen it lock out twice, once on initial start up it went into motor protection and the motor protection relay and the high pressure relay were both chattering very loudly. The other time the compressor came on and ran until the first condenser fan came on and the condenser fan motor contractor started chattering very loudly, they are all 120 volt coils, check all connections on the neutral side, they all look ok and tight. The chiller will run for two to three days with out a fault in warm to hot weather, Any ideas what to check next.
thanks
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.
hello,
Do you happen to have recorders available for volts/amps? Something like a Supco recorder kit?
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