RTHD-SVX01L-EN
63
Momentary Power Loss
The Momentary Power Loss diagram shows how the
controls act in a power interruption event that the controls
diagnose as a MPL diagnostic.
Figure 35. Sequence of events: momentary power loss
Running
Starting
Cprsr
Energize Unload
Solenoid
De-Energize
Compressor
De-Energize Condenser
Water Pump Relay
Energize Condenser
Water Pump Relay
Energize Unload Solenoid
(40 Seconds)
MPL Cleared and Need to Cool
Confirm No
Compressor Currents
Within 0-30 Seconds
Waiting to Start
Enforce Restart Inhibit Time r
(0 to 30 mins)
Establish Cond Water Flow (6 sec Minimu m )
Momentary Power Loss Detected
Shutting Down
Enforce Stop to Start Timer
(5 to 200 Seconds)
(30 Second Default)
Confirm Condenser Water Flow
Within 20 minutes
(6 Sec Filter)
Enforce Power Up Start Delay
(0 to 30 mins)
Energize Oil Heater
Start-Up and Shutdown
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