TurboChef Encore Touch Rapid, Service Manual

Page: 74 / 116

48 TROuBLESHOOTInG
Troubleshooting:
f2: LOW TEMP (Cook Temperature Low)
YES
Replace the
defective heater.
Replace the solid state
relay.
NO
SSR is defective
Replace the I/O
control board
(SAGE).
Correct wiring.
YES NO
Reset and determine why
it tripped – excess grease
buildup, etc. The reset
button is on the back panel
near the power cord. Is the high-limit
thermostat tripped?
Is wiring from the solid state relay
to the I/O control board OK?
Check wires at the 4-pin connector
on the SSR:
(A + - + - B)
1 2 3 4
(See page 64 for schematic.)
Ensure wiring is
correct. If neces-
sary, replace the
defective RTD.
SSR OK
YES
NO
Is each RTD functioning
properly? (See page 33,
section “RTD - Top and
Bottom Testing Procedure”
for testing instructions.)
Is the solid state relay defective?
1. Leave the 4-pin control wiring
connected.
2. Set the meter to DCV.
3. In Test Mode, turn on the top
(H1) heater (page 19).
4. On K5, check between B(-) white
to ground. If the signal goes from
24 VDC to 0.VDC, then the
signal is good and the SSR is
defective.
5. Repeat steps 3-4 for the bottom
(H2) heater on K4 between A(-)
white to ground.
Heater is
defective
Is the H1 or H2 heater defective?
1. Isolate the heater circuits by
disconnecting them from the
high-limit switch.
2. The top (H1) heater should
have a resistance of 13 Ohms
at room temperature.
3. The bottom (H2) heater
should have a resistance of
14.4 Ohms at room
temperature.
See page 19, sections “Top
Heater Test” and “Bottom
Heater Test” for Test Mode
instructions.
Heater OK