I just picked up a client that owns numerous condo's. I have a heat pump problem that has me puzzled. The system starts and runs, then after approximately 10 minutes the reversing valve starts to growl, the fan shuts off and the compressor continues to run. The Defrost control board is a YORK GUARD W8045A (which is discontinued) The fault code LED blinks 5 times, pauses then repeats.
The condo complex has not kept any of the installation manuals and I cannot find one online. The system is a YORK Heat Pump EMCM594 172, HP 554N.
I also need the R-22 Charging scale which is typically included in the installation manual.
Any information you fellows can provide would be most appreciated.