Groen CC20-E Operator's Manual page 253

Maintenance
Test and Adjustments
Water Inlet Valve Mechanical Checks
6. Slowly and carefully remove the diaphragm. Inspect diaphragm
for cuts or tears. Clean the vent hole in the diaphragm. Replace
water inlet valve if diaphragm is damaged.
7. If the diaphragm is not damaged, assemble it to the valve, then
install the valve (see page 8-27).
8. Turn on the water supply.
9. Connect oven to the branch circuit, turn on oven power and operate
oven in Steam or Combo mode.
10. Check valve operation. If there is a boiler fill, condensate spray, or
auto clean cycle operation problem, replace water inlet valve.
Air Heating Element - Electric Units
When oven power is turned on, there is high voltage present
in the electrical components compartment.
Be sure oven is disconnected from branch circuit power
before performing any repair work.
1. Allow oven to cool. Turn on oven power. Select Oven mode and set
to 575°F.
2. Verify that relay operation is correct. Refer to the Operation
paragraph in section CC10-E or CC20-E to determine what relays
are active for the Oven mode.
3. CC10-E: Be sure to measure single heater power. Using a clampon
ammeter, measure current in the following wire pairs:
A1 - A4 (heater AH2)
A2 - A5 (heater AH3)
A3 - A6 (heater AH1)
If zero (0) amps is measured in any of these wire pairs, the
associated heater is defective and must be replaced. See
page 8-45 for air heating element replacement.
CC20-E: Be sure to measure single heater power. Using a clampon
ammeter, measure current in the following wire pairs:
A1 - A2 (heater AH1)
A2 - A3 (heater AH2)
A4 - A5 (heater AH3)
If zero (0) amps is measured in any of these wire pairs, the
associated heater is defective and must be replaced. See
page 8-45 for air heating element replacement.
8-8
(continued)
WARNING
WARNING
(Revised 1/02)