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Diagnosis:
KM-1601SAH/3 "G" CB: If PM does not reverse, check to see if S4 and S5 dip
switch settings are in the factory default position. If S4 dip switch 3 and 4 are
adjusted to 3 off and 4 on, WV and harvest pump timer relays energize. Once these
relays energize, PM rotates in the freeze cycle rotation. See "III.B. Wiring Diagrams."
Check PM circuit and capacitor, check CB K1 ten-pin connector pin #5 (DBU wire)
for voltage. Also check X10 relay. X10 relay must be de-energized and X10 relay
terminal #2 must be energized for PM to rotate in the proper direction. If water does
not pump out, check and clean the pump-out check valve assembly and tubing.
KM-1601SWH/3, KM-1601SRH/3 "E" CB: If PM does not energize, check PM
circuit and capacitor, check CB K1 ten-pin connector pin #5 (DBU wire) for voltage.
If water does not pump out, check and clean the pump-out check valve assembly
and tubing.
7) Normal Harvest Cycle – same as the initial harvest cycle – Return to "IV.A.4) Initial
Harvest Cycle."
8) Shutdown – When the unit is running hold ice in contact with TBC bulb, TBC switch
opens within 10 seconds, shutting down the unit (CB red "POWER OK" LED turns off).
TBC is factory set, and generally no adjustment is required. However, adjustment may
be needed in some conditions, particularly at higher altitude locations. Diagnosis: See
"IV.C. Bin Control Check."
Legend: CB–control board; Comp–compressor; FM–fan motor; FMR–fan motor-remote;
F/S–oat switch; HGV–hot gas valve; HM–headmaster (C.P.R.); L LV–liquid
line valve; PM–pump motor; TBC–thermostatic bin control; TXV–thermostatic
expansion valve; WV–inlet water valve