Performing service on one circuit. Circuit is currently in a vacuum.
- Chiller will not start circuit that is not in alarm.
- Circuit in alarm is out of refrigerant.
The Very Low Evaporator Refrigerant Pressure alarm is intended to protect the chiller when suction pressure transducers are assigned to the opposite circuit.
Very Low Evaporator Refrigerant Pressure - xy Chiller Immediate Latch All The respective circuit's evaporator pressure dropped below 80% of the current Low Evap Refrigerant Press Cutout setting (see above) or 8 psia, whichever is less, regardless of the running state of the circuit's compressor.
- Lock out the circuit which is either out of refrigerant or under a vacuum during repair.
Unbind the suction pressure transducer for the circuit which is Locked Out.
- Verify all other devices are bound correctly LLID Binding (Tracer TU)
Reset alarm
Comm Loss:
Suction Refrigerant Pressure - xyCprsr Immediate Latch All
[Ckt/Cprsr lock out]Continual loss of communication between the MP and the Functional ID has occurred for a 30 second period.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.