Groen CC20-E Operator's Manual page 249

Maintenance
Test and Adjustments
High Limit Thermostats
Be sure oven is disconnected from branch circuit power
before performing any repair work.
1. Disconnect oven from the branch circuit.
2. Check if electrical leads to the thermostats are identified. If identification is
missing, correctly mark the wires before disconnecting them. See control
schematic in Sections CC10E, CC20-E, CC10-G, and CC20-G.
3. Disconnect electrical leads from the high limit thermostats (TC1 and TC2 for
electric units, TC1 for the gas units.)
4. Be sure oven is cool. Measure continuity between the thermostat terminals. If
the meter reads an open circuit, replace the thermostat.
5. If thermostat circuit is closed, reconnect electrical leads to the high limit
thermostats.
6. Operate oven in Oven mode at 575°F and run for 10 minutes. If the control
panel shuts off BEFORE reaching 575°F, turn off the oven and quickly repeat
steps 1 through 4.
Drain Valve (Prior to Serial Numbers GC7243MS and C7439MS)
When oven power is turned on, there is high voltage present
in the electrical components compartment.
1. Turn on oven and select Steam mode. Leave door open and allow boiler to fill.
2. Measure voltage between relay K15 contact terminals. Voltage should be
0VAC.
3. After boiler has filled, select Oven mode. (Prior to Serial Numbers GC7243MS
and C7439MS) or select "OFF" (After Serial Numbers GC7243MS and
C7439MS).
4. Measure voltage between relay K15 contact terminals. Voltage should be
24VAC.
5. Check that the valve is fully open and boiler is draining.
Be sure oven is disconnected from branch circuit power
before performing any repair work.
6. If the drain valve does not operate as described above, disconnect oven from
the branch circuit and remove valve from the oven. See page 8-27 for valve
replacement instructions.
8-4
WARNING
WARNING
WARNING
(Revised 1/02)