O.K. the line from the controller to the compressor has an open through the pressure switches. Which switch is open I do not know. It could be just low on freon.

Pump works ok so that will stay as it is.

thanks

gary

Post edited 3:42 pm – May 26, 2011 by Steve Pooler

Just an update here to all that may be interested…  

Gary's systems were Lunaire brand with the Micro Air FX1/Coastal Climate controls…

The problem/s turned out to be both High Pressure switches had failed…Likely due to many cycles when he had the stuck seawater pump.

The pressure switches (Low & Hi) are auto reset, and as suggested, were Daisy Chained in-line with the compressor Line-1…After the control…The Micro Air control then only sees the surges in amperage & cycles the units with a CLF (Compressor Load Fault) error code on the display (After 3-4 restarts)….This is not as positive a method IMHO as connecting the switches to the microprocessor & letting it cycle the compressor off…It also won't know which pressure switch is seeing the fault so the display won't show a Hi or Low pressure fault…Just a CLF…It also stresses the pressure switches, wiring, and breaker with the compressor cycling on that heavy amperage draw…When a control allows microprocessor connection to the switches (and it is done that way) it waits long enough for the pressures in the system to equalize or energizes the reversing valve to equalize instantly before the next re-start, and thus does not allow a hard re-start as is done with a switch/s in-line to the compressor….But that's not the way of the FX-1 Coastal Climate Control…Or at least this version…

The fix was to install new line voltage High pressure switches on each unit's High side service port since the old switch/s was/were soldered in from the factory…Installing the new (screw on type) switches on the available service port/s avoids having to recover the refrigerant to solder in a new switch in it's original location, then recharging & leak testing those solder joints…The wires to the old switch were cut (At the old switch) and then connected to the new switch with push on connectors. 

Please be aware that all pressure switches are not created equal…Some can carry compressor load, and some are only built for low amperage…Like to gate a contactor's magnetic coil, or connect to a circuit board with microprocessor…If you come across this thread & want to DIY your pressure switch…Just be aware of that before you go hunting for pressure switches.

I''d also like to thank Gary for the work…He was a pleasure to work for…

Thanks Gary    Hope you have a cool summer…

Steve~