Mechanical Timer - Cleveland steamcraft 21-CET-8 Service Manual

Mechanical Timer

• If the meter reads high or infinite resistance after 10 minutes, carefully open
compartment door and check that the unit is generating steam -
a. If the unit is generating steam, and the cooking compartment is hot,
replace the compartment thermal switch.
b. If the unit is not generating steam, the test results arc inconclusive. Repair
the steam generating capabilities of the SteamCraft 3.1 and repeat this
test procedure.
1. Set the voltmeter to the 250 VAC scale.
2. Set the ON/OFF switch to the ON position.
4. Set the TIMED/MANUAL switch to the MANUAL position. Operate the
SteamCraft 3.1 for about 10 minutes, or until it is steaming continuously.
5. Set the TIMED/MANUAL switch to the TIMED position, and zero the timer.
Steam generation will stop. When the water level in the float cylinder stabilizes
at the high level switch, perform step 6.
6. Set the timer dial to 10 minutes. Compare the actual steamer operation to that
described in steps 8 through 10 of the Operating Tests - Dial Tuner Control
Panel section of Chapter 2.
• If actual operation matches the described operation, continue this procedure
with step 7.
• The timer fails the 10 minute test if actual operation does not match the
described operation. Replace the timer and end the procedure here.
Typical failures are:
a. Steaming continues after the preset lime on the dial elapses to 0.
b. The dial time is fast or slow compared to real time. (10 minutes on the dial
elapses after 5 or 20 minutes real time.)
c. The timer dial does not complete the countdown to zero.
7. Set the timer dial to 0. Refer to Figure 5-21. Check for 120 VAC across timer
terminals L1-T1. and 0 VAC across timer terminals L1-T3.
• If the meter reads 120 VAC across L1-T1 and 0 VAC across L1-T3, continue
this procedure with step 8.
• If the meter reads 0 VAC across L1-T1, the contacts L1-T1 are shorted within
the timer. Replace the dial timer.
• If the meter reads 120 VAC across L1-T3, the contacts L1-T3 are open within
the timer. Replace the dial timer.
8. Set the timer dial to 10 minutes. Refer to Figure 5-21. Check for 0 VAC across
timer terminals L1-T1 and 120 VAC across timer terminals L1-T3.
• If the meter reads 0 VAC across L1-T1 and 120 VAC across L1-T3, the dial
timer is good. End this procedure here.
• If the meter reads 120 VAC across L1-T1, replace the dial timer.
• If the meter reads 0 VAC across L1-T3, replace the dial timer.
Model 21 -CET-8 Service Manual
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