Table of Contents
Advertisement
Diagnostic sequence – motor over-current condition
If either of the circuit boards senses a current over 3 amps, five things happen:
1. The DR LED goes out, the DRV terminal is de-energized and the gearmotor shuts down.
2. The C LED goes out, the FAN terminal is de-energized, cutting power to the coil of the relay.
3. The relay contacts open, cutting power to the coil of the solenoid valve and the condensing unit
pumps down.
4. The condensing unit shuts off on the low pressure control.
5. The 20M LED is turned on.
After 20 minutes the 20M light is turned OFF and the machine goes through the normal start-up described above.
If the restart is successful, the 60M light is turned ON and remains ON for 60 minutes. This alerts the user to a
problem in the drive system. If the icemaker runs without an overcurrent condition during the 60 minute period the
60M LED will go out and the icemaker will continue normal operation. If the restart is unsuccessful, or if the board
detects another 3 amp current during the 60 minute period, the 2ND light is turned ON and the machine shuts
down and can only be started by pressing the reset button.
Diagnostic sequence – no water
If the water level in the float reservoir drops too low, three things happen:
1. The WTR light is turned OFF.
2. The ice machine shuts down.
3. The BT light turns ON.
If water is restored, the WTR light will flash, the BT light will turn OFF after 20 minutes, and the machine goes
through the normal start-up described above. The flashing light can be cleared by pressing the reset button.
BIN LOW V
WTR PROBE
RESET
HP SW
COMP
HIGH VOLTAGE BIN
Recognizes
Compressor
conductivity
switch
through closed
terminals
bin thermostat
on storage bin
PWR
Status lights
DR
If ON, DRV terminal is energized
C
If ON, COMP and FAN terminals are energized
DR
If ON, overcurrent has occurred on gearmotor
20M
in past 20 minutes
C
If ON, overcurrent has occurred on gearmotor, but
60M
successfully restarted in the past 60 minutes
20M
If ON, overcurrent has occured on gearmotor twice
2ND
and has shut down
60M
If ON, water sensor detects water
WTR
If OFF, water sensor does not detect water
2ND
If BLINKING, water sensor detected loss of water
B-T
If ON, delays restart of IM for 20 minutes
WTR
B-E
If ON, bin stat indicates need for ice
B-T
B-E
Recognizes
24V to 120V
bin signal from
dispenser
23
See Diagnostic sequence –
no water above
See Diagnostic sequence –
motor over-current condition above
Advertisement
Table of Contents
