Convection Heater - GE Advantium PSA1200R Technical Service Manual

Convection Heater

•
Location (See
Right Side View
• 1550 Watts
• Approximately 13 Amps
• Approximately 9 Ω
• For operating algorithms, see Convection Heater
in the
Load Algorithm Chart
• Disassembly. (See
Disassembly
Troubleshooting
1. Does the display operate properly?
• If no, see
VFD Board
• If yes, go to step 2.
2. Is Convection Heater staying on all the time or
not coming on?
• If heater is staying on, go to step 8.
• If heater is not coming on, go to step 3.
3. Pivot the Control Panel Assembly out from the
oven. (See
Control Panel Removal
4. To gain better access to components, remove
the wires that plug into the large relays on the
Relay Board. (See
Relay Board
that the Smart Board CN103 wire harness (See
.) is routed through.
Smart Board
.)
.
.)
, troubleshooting step 1.
.)
.) Cut the wire tie
– 50 –
5. Set oven for Convection Bake, 350°F. (See
for set up instructions.)
Operating Modes
6. Start Convection Bake cycle. While unit is
running, check resistance between the 2
terminals on Relay Board RY12. Note: This step
requires checking resistance of relay contacts
while the unit is running. The convection heater
relay wires must not be connected to the relay
when making this check.
• If resistance is infi nite, the convection
bake relay is not closing. (See
troubleshooting step 2.)
• If resistance is approximately 0 Ω, go to step 7.
7. Check resistance between the single wire (blue
wire) that connects to Relay Board RY12 and the
output of the Primary Interlock Switch (brown
and red wires).
• If resistance is approximately 9 Ω, see
Primary Interlock Switch,
step 4.
• If resistance is infi nite, problem is with:
◊ Convection Heater, or
◊ Convection Heater TCO, or
◊ Wiring between the Convection Heater
and Convection Heater TCO, or
◊ Wiring between the Primary Interlock
Switch and the Convection Heater TCO, or
◊ Wiring between Convection Heater and
the connector that connects to RY12.
8. Disconnect Relay Board RY12 connector. Does
heater stay on?
• If no, the Relay Board RY12 is stuck on. (See
, troubleshooting section.)
Relay Board
• If yes, the neutral wire to heater is shorted
to ground.
,
Relay Board
troubleshooting