Service Manual

20
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
1st Pump-Out
No. 5
OFF Every 10 cycles After 11th freeze cycle
ON Every cycle After 2nd freeze cycle
Comp and FMR continue, HGV energizes. 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, X11
relay energizes, energizing X10 relay, causing PM to rotate in freeze rotation not
pump-out rotation. LLVde-energizes. PM stops for 2 sec., then reverses 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)."
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 PM
stops and re-starts. Next, check that PM rotation is correct (water owing down the
drain through CV). If PM does not stop and re-start, check that CB LEDs 1, 3, and
2are on. If not, replace CB. IfLEDs1,3, and 2 are on and PM does not energize,
check for 115VAC at CB K1 #5 (DBU) to neutral (W). If 115VAC is not present, replace
CB. If115VAC is present, check that X10 relay is de-energized. If not, check X11 relay
status. If X11 relay is energized, replace CB. If X11 relay is de-energized and X10 relay
is energized, replace X11 relay (contacts sticking). If X10 relay is de-energized, check
for 115VAC at terminal #6 (DBU) to neutral (W) and terminal #2 (DBU) to neutral (W).
If 115VAC is present on terminal #6 (DBU) and not on terminal #2 (DBU), replace
X10relay. If PM is energized and rotating in pump-out rotation, make sure the drain line
is not clogged and that CV is clean and operating properly.
Conrm LLV de-energizes. If LLV is energized with LEDs 1, 3, and 2 on, replace CB.