Service Manual

38
2. LED Lights and Audible Alarm Safeties
At startup, CB green "POWER OK" LED turns on immediately to indicate proper control
voltage and will remain on unless a control voltage problem occurs. For further details,
see "II.B. Service Diagnosis."
Sequence Step LED
Energized
Components Min. Max.
Fill Cycle WTRIN WV - -
Ice Purge Cycle GM GM, EH 5 min. 5 min.
Freeze Cycle (with rell) GM, COMP,
WTRIN* (rell)
GM, EH, PDS, Comp,
FMR, WV* (rell)
- *On until UFS closes. Alarm
sounds after 90 sec.
1-in-1 Drain Cycle
(S1 dip switch 4 off)
FLUSH (Drain)
GM, COMP
(only if BC not
satised)
DV, Comp, GM, EH,
PDS, FMR (only if BC
not satised)
2 sec. 2 sec.
1-in-12 Drain Cycle
(S1 dip switch 4 on)
FLUSH (Drain) DV 10 min. 10 min.
The built-in safeties shut down the unit and have alarms as listed below.
No. of Beeps
(every 5 sec.)
Type of Alarm Reset Options
1 Low Water Safety (FT)
UFS open > 90 sec. after WV energized.
Automatic reset once water supply is restored
and UFS closes.
2 Control Switch
In "DRAIN" position longer than 15 min..
Automatic reset once the control switch is
moved to the "ICE" position.
3 High-Pressure Switch:
First and second activation in 1 hr.
Automatic reset once pressure drops
below the high pressure threshold and the
high-pressure switch closes.
4 High-Pressure Switch:
Third activation in 1 hr.
Call for service. To avoid possible
catastrophic failure, it is recommended to
leave the icemaker off until this alarm is
resolved. Manual reset. Turn power off and
on again.
5 Freeze Timer (FZT)
WV off > 30 min. since last WV activation.
Manual reset. Turn power off and on again.
6 Low Voltage
(92VAC±5% or less)
CB green "POWER OK" LED turns off if
voltage protection operates.
The control voltage safeties automatically reset
when voltage is corrected.
7 High Voltage
(147VAC±5% or more)
8 Gear Motor
CCR contacts fail to close.
Manual reset. Turn power off and on again.
9 BC1 (infrared sensor) fails (CB S1 dip switch
7 on)
BC2 (mechanical backup) spout cover
magnet disengaged.
Manual reset. Turn power off and on again.
Legend: BC1–bin control (infrared sensor); BC2–bin control (mechanical backup);
CB–control board; CCR–compressor control relay; Comp–compressor;
DV–drain valve; EH–evaporator heater; FMR–fan motor(s)-remote; FT–ll timer
(90-sec. low water safety timer); FZT–freeze timer (30-min. freeze safety timer);
GM–gear motor; PDS-pump-down solenoid valve; WV–inlet water valve
3. Ice Purge Cycle Bypass
To speed up the diagnostic process, the 5-min. ice purge cycle may be bypassed
by pressing the "SERVICE" button on the control board after the gear motor starts.
WARNING! Risk of electric shock. Care should be taken not to touch live terminals.