Service Manual

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7) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the
rst pump-out is determined by S4 dip switch 5. See the table below.
Control Board Settings
S4 Dip Switch Setting
Pump-Out Frequency Control Board
No. 5
OFF Every 10 cycles After 11th freeze cycle
ON Every cycle After 2nd freeze cycle
Comp and FMRs continue, HGVs energize.
Note: If S4 dip switch 3 & 4 are set to 3 off and 4 on, LED 4 turns on and WV and X11
relay energize, energizing X10 relay. NOTICE!S4dip switch 3 & 4 must not be set
to 3 off and 4 on. Otherwise, LED 4 turns on energizing WV and X11 relay. X11
relay energizes X10 relay. Once X10 relay energizes, X12 relay cannot energize.
Preventing DV from energizing.
LLVs de-energize. PM stops for 2 sec., then restarts for 10/20 sec. depending on
pump-out timer (S4dip switch 3 & 4) setting. When the pump-out timer terminates,
pump-out is complete. The pump-out frequency control (S4 dip switch 5) is factory set,
and generally no adjustment is required. However, the pump-out frequency control can
be set to have a pump-out occur every 10 cycles or every cycle. For details, see "III.C.4.
Pump-Out Frequency Control (S4 dip switch 5)."
a) Pump-Out Diagnosis: In the freeze cycle before pump-out (see table above), after
5min. of freeze disconnect CB black K5 connector (FS connector). Check that CB
LEDs 1, 3, and 2are on, PM stops, then restarts, DV energizes, and water is owing
down the drain through DV.
b) CB Diagnosis: Conrm LLVs de-energize. If LLVs are energized with LEDs 1, 3,
and 2 on, replace CB. If PM does not stop and restart and DV does not energize,
check that CB LEDs 1, 3, and 2 are on. Ifnot, replace CB. IfLEDs 1, 3, and 2 are on
and X12 relay is not energized, check for 115VAC at CB K1 #5 (DBU) to neutral(W).
If115VAC is not present, replace CB. If115VAC is present at CB K1 #5 (DBU) and
X12 relay is not energized, continue to "c) X12 Relay Diagnosis:" below. If X12
relay is energized and DV are not energized, check for 115VAC at CB K1 #2 (P) to
neutral(W). If LED 2 is on and 115VAC is not present at CB K1 #2 (P), replace CB.
c) X12 Relay Diagnosis: If 115VAC is present at CB K1 #5 (DBU) and CB K1 #2 (P)
and X12 relay and DV are not energized, check for 115VAC at X12 relay #8 (P) to
neutral (W). If115VAC is not present, check wiring connections from CB K1 #5 (DBU)
to X12 relay #6 (DBU), then at X12 relay #4 (W/R). If 115VAC is present at X12 relay
#6 (DBU) and not at X12 relay #4 (W/R), conrm X12 relay is de-energized, if X12
relay is de-energized, replace X12 relay (sticking contacts). If 115VAC is present
at X12 relay #5 (DBU) to neutral (W), and X12 is de-energized, check relay coil
continuity. Replace as needed.