Service Manual

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5) Freeze Cycle – LED 1 is on. Comp, FMR, and PM remain energized (PM power
supply switches from CB K1 connector pin #5 (DBU wire) to CB K1 connector pin
#4(Rwire). LLVs energize. HGVs and X10 relay de-energize. CB 5-minute short cycle
protection timer prevents CB from monitoring F/S for the rst 5 minutes of freeze. After
the 5-minute short cycle protection timer terminates, CB turns freeze termination over
to F/S. Diagnosis: Check that Comp, FMR, and PM remain energized. Conrm that
evaporator temperature drops. Ifnot, conrm that LLVs are energized and open. If not,
check for 115VAC at CB K1 connector pin #3 (BK wire) to a neutral (W wire). Check that
WV and HGVs are de-energized and closed (not leaking by). Next, conrm proper unit
pressures and TXV operation, check for an inoperative HM or an inefficient Comp. After
5 minutes in freeze, disconnect black F/S connector from CB K5 (black) connector. After
a 15second delay, the unit should switch out of the freeze cycle. If the unit switches out
of freeze with F/S connector removed, but would previously not switch out of freeze with
F/S connected (long freeze - 3 beep alarm), F/S may be sticking. To check and clean
F/S,see"IV.D.FloatSwitchCheckandCleaning."Iftheunitremainsinfreezelonger
than 15seconds after disconnecting CB K5(black) connector, replace CB. For short
freeze cycle, check that water tank is full at beginning of freeze, that check valve, drain
plug, and overow pipe are not leaking.
Note: Normal freeze cycle will last 20 to 40 minutes depending on model and conditions.
Cycle times and pressures should follow performance data provided in this
manual.See"III.C.PerformanceData."
6) Pump-Out Cycle – (10/20 second pump-out) – LEDs 1, 3, and 2 are on. LED 4 is on
whenS4dipswitch3&4aresetto3offand4on.Fordetails,see"II.C.3.c)Pump-Out
Timer(S4dipswitch3&4)."NOTICE! Do not adjust S4 dip switch 3 & 4 to 3 off and
4 on. Adjustment to this position on this model prevents the pump motor from
rotating in the pump-out (reverse) direction. Comp and FMR remain energized,
HGVs energize. LLVs de-energize. PM de-energizes for 2 seconds, then energizes in
reverse direction for 10seconds. When the pump-out timer terminates, pump-out is
complete. The pump-out timer is factory set for 10 seconds and the pump-out frequency
is factory set for every 10th cycle, and generally no adjustment is required. However,
where water quality is bad and the icemaker needs a longer and/or more frequent
pump-out, the pump-out timer and pump-out frequency control can be adjusted. The
pump-out timer (S4 dip switch 3 & 4) can be set to have a 10 or 20 second pump-out.
Fordetails,see"II.C.3.c)Pump-OutTimer(S4dipswitch3&4)."Thepump-out
frequency control (S4dip switch5&6) can be adjusted as shown in the table below.
Timing of the rst pump-out is dependent on S4 dip switch 5 & 6settings. See the table
below.
S4 Dip Switch Setting
Pump-Out
Frequency
1st Pump-Out
No. 5 No. 6
OFF OFF Every cycle After 2nd freeze cycle
ON OFF Every 2 cycles After 3rd freeze cycle
OFF ON Every 5 cycles After 6th freeze cycle
ON ON Every 10 cycles After 11th freeze cycle