Hoshizaki KML-325MWJ Service Manual page 21

e) X13 Relay - If 115VAC is present at X12 terminal #3 (DBU) to neutral and PM and
DV are not energized, check for 115VAC at X13 terminal #8 (DBU) to neutral (W).
If 115VAC is present and X13 relay is de-energized, replace X13 relay.
(1) For PM and X13 Relay: If 115VAC is present at X13 terminal #8 (DBU), check
for 115VAC at X13 relay #6 (BK) and X13 relay #4 (Y) to neutral (W). If 115VAC
is present at X13 relay #6 (BK) and not at X13 relay #4 (Y), replace X13 relay
(contacts sticking open). If 115VAC is present at X13 relay #4 (Y) and PM is not
energized, check PM capacitor, motor winding, and impeller for binding.
(2) For DV and X13 Relay: If 115VAC is present at X13 terminal #8 (DBU), check for
115VAC at X13 relay #5 (DBU) and X13 relay #3 (W/BU) to neutral (W). If 115VAC
is present at X13 relay #5 (DBU) and not at X13 relay #3 (W/BU), replace X13
relay (contacts sticking open). If 115VAC is present at X13 relay #3 (W/BU) and
DV is de-energized, check DV coil continuity, make sure the drain line is not
clogged and that DV is clean and operating properly.
8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above.
Note: Appliance continues to cycle until TBC is satisfied or power is switched off. The
appliance always restarts at the 1-min. fill cycle.
9) Shutdown
a) Thermostatic Bin Control (TBC):
When the appliance is running, hold ice in contact with the thermostatic bulb. BC
switch opens within 10 sec., shutting down the appliance. 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 "II.D. Bin Control Check." CB red K4 connector must have the
jumper in place. When the jumper is in place, the green "BC CLOSED" LED remains
on. If the jumper is not in place, yellow "BC OPEN" LED turns on and the icemaker
turns off and remains off until the jumper is replaced in its original position. NOTICE!
CB red K4 connector jumper (4A4883G01) must be in place.
Legend: CB–control board; Comp–compressor; CR–compressor relay;
DV–drain valve; FM–fan motor; FMR–fan motor-remote; FS–float switch;
HGV–hot gas valve; HM–headmaster (C.P.R.); HPS–high-pressure switch;
LLV–liquid line valve; PM–pump motor; TBC; thermostatic bin control;
TXV–thermostatic expansion valve; WRV–water regulating Valve;
WV–inlet water valve
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