85
C. Hardware
1. Determine the location of the SSR that controls the suspect heater
module. Also identify the channel number. Verify that the blower
motor is functioning for this zone.
2. Verify that the heater coil has not shorted to ground by following
this procedure. Open the breaker for the suspect zone and test for
continuity between each heater wire and ground. Continuity
indicates a shorted heater coil or frayed wire, which should be
replaced. (
See
Maintenance Procedures, section I
)
3. Using a voltmeter set to VDC scale, check the input control
voltage on the SSR for the over-heating zone with the common
lead to terminal 4 (-) and the (v) lead on terminal 3(+).
(Note: you must be running a recipe, and set the zone in question to
manual 0% power.) If the DC voltage reads 0V, the SSR is receiving a
signal to turn the zone off. If voltage is present, the HC1-X or HC2
controller may be faulty and should be replaced.
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