Cleveland steamcraft 21-CET-8, Service Manual, Page: 98 / 139

Model 21 -CET-8 Service Manual Page 91
circuits. Note any operating malfunctions, and continue this procedure
with step 3.
3. If the timer display is blank, the timer is either not receiving power from
the 24 VAC transformer, or the timer is faulty. The timer may not be
receiving 24 VAC power from the transformer due to faulty wiring.
a. Check the black and yellow wires between the transformer output and
the timer input for continuity and secure connections. Inspect the black
to yellow connections. Replace or repair faulty wiring and connections.
b. Check the black and tan wires between the transformer input and the
TIMED/MANUAL switch for continuity and secure connections. Inspect
the black to tan connection. Replace or repair faulty wiring and
connections.
c. Check the white and white/black wires between the transformer input
and the ON/OFF switch for continuity and secure connections. Inspect
the white to white/black connection. Replace or repair faulty wiring and
connections.
d.When the wiring and connections of steps a through c are good,
continue this procedure with step 4.
4. The timer may not be receiving power due to a faulty 24 VAC transformer
or lack of 120 VAC to the transformer.
a. Check for 120 VAC across the transformer input terminals (black
wires).
• If the meter does not read 120 VAC, the transformer is not receiving
power. Test the ON/OFF and TIMED/MANUAL switches.
• If the meter reads 120 VAC, continue this procedure with step b.
b. Check for 24 VAC across the transformer output term inals (yellow
wires).
• If the meter reads 24 VAC, the transformer and wiring are
performing correctly. Replace the timer.
• If the meter does not read 24 VAC, the transformer is faulty.
Replace the 24 VAC transformer.
5. If the PAUS indication docs not start after pressing the START/STOP
key, or if the indication continues longer than 5 minutes; test the
compartment thermal switch.
• Repair or replace the compartment thermal switch according to that test
procedure.
• If the compartment thermal switch tests good, replace the timer.
6. If the condenser solenoid and heater contactor do not energize, check
the two orange wires between the timer and the TIMED/MANUAL switch
for continuity and secure connections.
• Replace or repair faulty wiring and connections.
• If the wiring and connections arc in good condition, test the
TIMED/MANUAL Switch.
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