Groen 2TRI-RES-20G, Service Manual

Page: 22 / 44

PART NUMBER 152797 REVISION A
CALL 888-994-7636 FOR TECHNICAL SUPPORT 22
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Fill Valve Fill valve is normally open
when water is below water
level sensor, 24VAC is applied
to coil or valve and it opens.
When water reaches the level
sensor, the coil de-energizes.
Run fill valve diagnostic.
Drain valve
Muffin Fan
Incorrect Wiring
Without power, the valve is
open, when 24VDC is applied
to the coil or the valve, it ener-
gizes to prevent draining. Run
drain valve diagnostic.
Verify 24VDC across muffin
fan coil.
Substitute to test
Check per wiring diagram
Press ON switch Audible click a gas valve
opens. Door switch
Incorrect wiring
gas valve Run sensor diagnostic
Check per wiring diagram
Verify 24VAC across valve coil.
About 20 minutes after clos-
ing the door, the oven comes
to ready; the temperature
indicator stops flashing.
gas valve Verify 24VAC across valve coil.
SETUP EXPECTED RESULTS PROBABLE DEFECT TEST or COMMENTS
Measure Input voltage and
amps. Input voltage is within 10% of
rated voltage and 5-7 amps.
Wrong model (voltage)
installed to incoming power
supply. Notify customer
Verify gas supply Propane or
Natural, and pressures. Correct gas source and pres-
sure. Wrong model ordered. gas conversion not performed
in the field.
Disconnect or turn off water
supply, open door, push OFF
switch. 24vac on secondary trans-
former. Heartbeat LED on back
on control board flashes once
a second.
No Line
Blown 10 amp fuse F1
24 volt control transformer
Control board or Relay board
Incorrect wiring
Standard test
Measure 120vac in and 24vac
+/- 20% vac out
Substitute to test
Check wiring diagram
Press ON switch
LEDs on control board illumi-
nate. 24 volt control transformer
Hi-limit (auto-reset)
Control board or Relay board
Incorrect wiring
Measure 120vac in and 24vac
+/- 20% vac out
Run sensor diagnostic.
Substitute to test
Check per wiring diagram