Incoming Power; Electrical Inspection - Market Forge Industries ST-10 Owner's Manual

SECTION 5. TROUBLE-SHOOTING
PROBLEM
Steam continues to flow into
compartment and/or buzzer
fails to sound at end of timer
cycle.
Steam flows continuously from
boiler (or direct connected
steam control) drain line with
cooker in operation.
The electrical trouble-shooting procedures that
follow require access to components and termi-
nals of the electrical control panel shown in Figure
7-3. Electrical controls are reached by removing
screws that fasten the control panel to the frame.
The panel may be pulled forward for testing while
interconnected to the cooker circuits or discon-
nected at the pin connection for complete removal
and repair.

5.4.1 INCOMING POWER

Before trouble-shooting any of the electrical parts
or assemblies, verify that power is being supplied
to the cooker. Incoming power is connected at the
boiler (or direct-connected steam) control box lo-
cated in the base cabinet. With power connected
to the cooker, an AC volt-meter is used to mea-
sure 120 volts across L1 and L2. If 120 volts is
present, and the cooker will not operate, the fault
lies within the electrical circuits of the cooker.
PROBABLE CAUSE
a. Timer contacts faulty.
b. Buzzer faulty.
c. Faulty wiring.
a. Cold water not connected.
b. Faulty thermostat.
c. Faulty cold water solenoid.
d. Faulty wiring.

5.4.2 ELECTRICAL INSPECTION

The first step in any electrical trouble-shooting
procedure is a thorough physical inspection of all
wiring connections. To access electrical compo-
nents, remove the control panel as explained in
Subsection 6.3.4.
Before removing control panel or checking
connections and wiring, be sure that the
circuit breaker for incoming power is OFF.
When power is supplied, all exposed termi-
nals of the control panel carry 120 volts.
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, visually inspect all quick-
disconnect terminals for evidence of corrosion.
Terminals in this condition should be separated,
cleaned with emery cloth until shiny, and tightly
reconnected.
14
REMEDY
a. Replace timer. See subsec-
tion 5.4.4.
b. Replace buzzer. See Sub-
section 5.4.9.
c. Inspect condition of wire and
tightness of all connections.
Correct as needed.
a. Turn on external shut-off
valve.
b. Replace thermostat.
Subsection 5.4.8.
c. Replace valve.
d. Inspect condition of wire and
tightness of all connections.
Correct as needed.
WARNING:
See