20
5.4 High Voltage Cable
If sparking starts during trial-for-ignition, the cable is good.
If there is no sparking during trial-for-ignition disconnect
DC power at the refrigerator terminal block or switch unit
off. Disconnect high voltage cable from the electrode. Re-
connect DC power. If there is a sparking sound from the
igniter during trial-for-ignition, then replace the high volt-
age cable and/or electrode. On newer units, the electrode
and high voltage cable are integrated into one compo-
nent.
5.5 Electrode
Do a visual check for cracks or breaks on the ceramic
insulator. A hair line crack can be hard to see ont the
electrode. The spark gap must be set at three sixteenths
(3/16”) of an inch and tip of the electrode should be above
the slots in the burner. When adjusting, always loosen
the screw and move into place. Never try to move without
loosening the screw. On newer units the electrode and
high voltage cable are integrated into one component. To
acquire the proper part always provide the product num-
ber.
Do not use the Channel Mark 6, Model 12 E igniter.
5.6 Climate Control Heater
The climate control heater is located behind the metal
frame between the doors. The heater helps to reduce
sweating on the metal frame during periods of high hu-
midity. The heater is on any time the refrigerator is turned
on. Follow wire from J3 (Red Lower Control Board) to the
terminal block with a light green wire and a red wire. Dis-
connect the light green wire and measure for proper ohms
resistance from the light green wire to ground, the reading
should be 24 ohms +/- 10%.
5.7 Thermofuse
The RM1350 cooling unit has a thermofuse located on
the boiler. The function of the thermofuse is to shut down
the control system in the event of a cooling unit problem.
On certain units the fuse can be reset by pushing the but-
ton in the center. The thermofuse is a non-replaceable
component of the cooling unit. When the fuse pops it is
normally an indication the cooling unit has a problem and
the cooling unit will have to be replaced. To test the ther-
mofuse, check for continuity. Lack of continuity would in-
dicate a faulty (open) thermofuse.
Thermofuse
on boiler
5.8 Door Switches
The door switch is an open switch when the switch arm
is depressed (interior light should be off). When the re-
frigerator door is open the switch is closed (interior light
should be on). Check that the switch assembly is properly
aligned and that it is not broken. Check the switch assem-
bly for continuity. To do a continuity check, rst be sure all
power is disconnected or OFF to the refrigerator.
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