Groen CC20-E Operator's Manual page 209

SERVICE CODES
Service Code 4
Table 4 provides information for troubleshooting when on a service call. The
columns list probable cause, replacement parts and special tools needed, and a
page reference to the service instructions. Proceed through the Probable Causes
in the sequence shown in the table. If the corresponding Corrective Action does
not correct the problem, proceed to the next Probable Cause and so forth, until the
problem is corrected.
Table 4 - Troubleshooting Service Code 4
Probable Cause
Be sure oven is disconnected from branch circuit power before performing any repair work.
Air temperature probe
harness may not be
securely connected to
the control panel.
Air temperature probe.
Air temperature probe
may not be installed
correctly.
Air temperature probe
circuit problem.
When oven power is turned on, there is high voltage present in the electrical components compartment.
Solid state controls may
be out of calibration.
Relay board and/or control
panel operation.
Faulty relay board.
Faulty control panel.
6-16
Corrective Action
WARNING
Check that harness is correctly and
securely connected to air temperature
harness terminals on the control panel.
Continually check the probe. Disconnect
the probe from the harness. Remove from
the oven and put in an ice water bath.
Check that probe is properly installed.
Disconnect air probe from probe harness.
Continuity check harness between control
panel and the probe. Replace harness if
an open circuit is measured.
With probe disconnected from harness,
continuity check harness wires to ground.
Replace harness if continuity is meas-
ured.
With probe disconnected from harness,
continuity check probe wires to chassis
ground. If any continuity is measured,
replace probe.
Continuity check probe wires. If an open
circuit is measured, replace probe.
Check solid state controls calibration.
(old electronics) Prior to serial numbers
GC7243MS and C7439MS.
Check relay board power supply.
Replace relay board or flex cable.
Replace control panel.
Test Equipment
————————
Digital ohmmeter
————————
Digital ohmmeter
Digital ohmmeter
Digital ohmmeter
Digital ohmmeter
Digital ohmmeter
WARNING
Calibration box,
P/N 074821
Voltmeter
————————
————————
Service
Reference
Location
Page 8-20
Page 8-3
Page 8-13
Pages 2-21
2-22, 3-32,
3-33, 3-34,
4-19, or 5-19
Pages 2-21
2-22, 3-32,
3-33, 3-34,
4-19, or 5-19
Pages 2-21
2-22, 3-32,
3-33, 3-34,
4-19, or 5-19
————
Page 8-1
Page 8-3
Page 8-24
Page 8-23
(Revised 1/02)