AUGUST 12, 2014 8 ST10-2G STEAMER
TROUBLESHOOTING
ELECTRICAL INSPECTION
The rst step in any electrical troubleshooting procedure
is a thorough physical inspection of all wiring connec-
tions. To access electrical components, remove the right-
side access panel on the upper cabinet.
Check all wiring connections by hand to assure that both
ends of all connection points are tightly secured. Use a
screwdriver to tighten connection points. If necessary, vi-
sually inspect all quick-disconnect terminals for evidence
of corrosion. Terminals in this condition should be sepa-
rated, cleaned with emery cloth until shiny, and tightly re-
connected.
60 MINUTE TIMER
Timer Contacts
Defective timer contacts will result in failure of either cook-
er compartment to operate. When this occurs, remove the
control pan and proceed as follows:
1. Turn off power to the cooker at external circuit break-
er.
2. Disconnect all ve wires from timer terminals.
3. Connect an ohmmeter between terminals 1 and 3.
4. Rotate timer dial beyond the “0-Minute” point (any
setting) to obtain a reading of zero ohms on the
ohmmeter. If zero ohm reading cannot be obtained,
timer contacts are defective and the timer must be
replaced.
5. Move ohmmeter leads to terminals 1 and 4.
6. Rotate timer dial to “0-Minute” position (an audible
click indicates correct position). If zero ohm reading
cannot be obtained, the timer is defective and must
be replaced.
7. Remove ohmmeter and replace all ve leads on timer
terminals.
Timer Motor
A defective timer motor will cause continuous operation in
the TIME mode, with the timer dial failing to return to the
“0-Minute” position. Since thermostatic switch failure can
cause the same symptom, fault must rst be isolated to
the timer by testing the thermostat.
To conrm timer motor condition, proceed as follows:
1. Carefully check motor wire leads and tighten loose
connections.
WARNING
Use care while working with control panel.
Terminals carry 120 Volts.
2. Turn on power to the steamer.
3. Set timer dial (any setting beyond “0-Minute”). If op-
eration is correct, the motor will turn the dial toward
“0-Minute”. If the motor fails to operate, it is defective
and the entire timer must be replaced.
4. Shut off power to the cooker.
DOOR INTERLOCK SWITCH
Malfunction of the cooker door interlock switch prevents
timer indicator lights from turning on and steam solenoid
from opening when the timer dial is set. If steam does not
enter the compartment and the cooking indicator light fails
to turn on with the door latch securely engaged, the fault
may be in the door interlock switch. Proceed as follows:
1. Turn off power to the cooker.
2. Disconnect wires to the door switch terminals.
3. Connect an ohmmeter between the terminals of the
switch.
4. Actuate the switch by closing the cooking compart-
ment door. If a zero reading cannot be obtained, the
switch is defective and must be replaced.
5. Remove the ohmmeter and replace the leads on
switch terminals.
INDICATOR LIGHTS
If the cooker compartment functions correctly, with the
single exception that the indicator light fails to light during
operation, the fault is a defective indicator light. A “burned
out” or defective light is veried by using an AC volt-meter
at the leads, with input power on the selector switch in the
correct position for that timer, the timer set, and the door
latches closed. If 120 volts is present, the fault is in the
indicator light and requires replacement. If 120 volts is not
present, the fault is in the wiring or control components
(selector switch, timer or door switch).
