Checking Mold Heater Resistance; Checking Voltage To Motor; Winterization - Norcold 1200 series Service Manual

Checking Mold Heater Resistance

To check the mold heater resistance:
1. Unplug the ice maker AC power cord.
2. Remove ice maker cover.
3. Set multimeter to Ohm scale, then connect probes
to test points L and H. Test probe tips must be 1/2
inch long to make full contact with internal
terminals. See Figure 62.
71 to 79 Ω–mold heater is operating properly.
Below 71 Ω or above 79 Ω–replace ice maker.
OL–open heater, replace ice maker.

Checking Voltage to Motor

To check voltage supply to motor:
1. Make sure 120 Vac is available to the ice maker.
2. Remove ice maker cover.
3. Set multimeter to AC scale, then connect probes
to test point N and M. See Figure 63. Test probe
tips must be 1/2 inch long to make full contact with
internal terminals. Voltage at the motor should
measure 108 to 132 Vac.
Voltage higher than 132 Vac–check incoming ac
power source and correct overvoltage condition.
Voltage lower than 108 Vac–check incoming ac
power source and correct under-voltage condition.
No voltage present–check wire connections and
continuity through thermal fuse.

Winterization

To winterize the water valve and water line:
1. Shut off RV water supply to the ice maker.
2. Raise and lock shutoff arm in OFF position.
3. Disconnect the water inlet adapter from water
valve.
4. Disconnect the ice maker water line from water
valve.
NOTE
Do not unwrap the water line heater wire from the water
valve outlet connection.
5. Drain RV water supply line and ice maker water fill
line.
6. Bag and tape shut all connections.
Refrigerator Service Manual
87 III TRUE RMS MULTIMETER
MIN MAX RANGE HOLD H
REL Hz
4 1/2 DIGITS PEAK MIN MAX
1 Seconds
mV
mA
V A
µA
V
OFF
A mA µA COM V
!
400mA MAX CAT II
FUSED
10A MAX 1000V MAX
FUSED
!
Figure 62. Checking mold heater resistance
87 III TRUE RMS MULTIMETER
V
MIN MAX RANGE HOLD
H
REL Hz
4 1/2 DIGITS PEAK MIN MAX
1 Seconds
mV
mA
V A
V µA
V
OFF
mA µA
A COM V
!
400mA MAX CAT II
FUSED
10A MAX 1000V MAX
FUSED !
Figure 63. Checking voltage to motor
www.norcold.com/cda
U R 185W–115V– 60 HZ
01/13/03
U R 185W–115V– 60 HZ
01/13/03
1200XX/120X-IMXX Models
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