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.
BI
N
LO
W
V
60M
HIGH
V
OLTAGE BI
N
COMP
HP S
W
B-T
W
TR
2
N
D
B-E
W
TR PROBE
P
W
R
RESET
DR
20M
C
60M
B-T
WTR
2ND
B-E
DR
Status li
g
hts
20M
C
If O
N
, DR
V
terminal is energized
If O
N
, COMP and FA
N
terminals are energized
If O
N
, o
v
erc
u
rrent has occ
u
rred on gearmotor
in past 20 min
u
tes
If O
N
, o
v
erc
u
rrent has occ
u
rred on gearmotor,
bu
t
s
u
ccessf
u
lly restarted in the past 60 min
u
tes
If O
N
, o
v
erc
u
rrent has occ
u
red on gearmotor t
w
ice
and has sh
u
t do
w
n
If O
N
, delays restart of IM for 20 min
u
tes
If O
N
,
b
in stat indicates need for ice
Recognizes
cond
u
cti
v
ity
thro
u
gh closed
b
in thermostat
on storage
b
in
Compressor
s
w
itch
terminals
Recognizes
24
V
to 120
V
b
in signal from
dispenser
See
Diagnostic sequence –
motor over-current condition
a
b
o
v
e
See
Diagnostic sequence –
no water
a
b
o
v
e
If O
N
,
w
ater sensor detects
w
ater
If OFF,
w
ater sensor does not detect
w
ater
If BLI
N
KI
N
G,
w
ater sensor detected loss of
w
ater
23
