TROUBLE-SHOOTING
17
is not obtained, the switch is defective.
Shut off cooker, disconnect ohmmeter leads, and
replace wires on switch terminals.
BUZZER:
If the buzzer does not sound at the termination of the
operator-selected timer setting (timer dial returned
to “0 Minute” position), the fault may be a defective
buzzer. Buzzer operation is verified using an AC volt-
meter at buzzer coil connections with input power on
and selector switch and coinciding timer dial set at the
“0 Minute” position. If voltage is 120 volts, the fault is
in the buzzer, which must be replaced. If 120 volts is
not present, the fault is in the wiring or control compo-
nents (timer or selector switch).
COLD WATER CONDENSER CIRCUIT:
If during cooker operation steam exits from the drain
line opening (located in lower boiler compartment) and
the condensing system fails to operate, as evidenced
by repeated discharge of water from the drain line,
the condensing circuit is malfunctioning. The failure
can be caused by a defective condenser thermostat
or cold water solenoid coil, or by wiring failure. To test
condenser thermostat, refer to cooking compartment
thermostatic switch section on page 15.
If the condenser thermostat functions correctly, but ei-
ther of the cold water solenoid valves fails to operate,
the cause might be a faulty valve coil. A defective coil
is found using an AC volt-meter to check the voltage
4.
at the coil wire terminals with the cooker compartment
in operation. If voltage of 120 volts is present and the
valve fails to open, the fault is in the valve coil. Defec-
tive valve coils are separately replaceable.
WIRING:
All of the electrical components of the cooker (timers,
indicator lights, etc.) are connected to each other by
wiring shown in Fig. 2 on page 11.
If all of the electrical components are operating cor-
rectly (and the incoming power has been checked),
but the cooker fails to operate, the fault lies in the
wiring.
Fig. 2 on page 11 is a diagram that shows all ter-
minals and interconnections within the electrical cir-
cuits. All numbered terminals are identified and all
leads number-coded as shown. Connections can be
easily removed.
Figure 3 on page 14 also shows the schematically
information and is an aid in isolating circuits for test-
ing.
Using an ohmmeter, wiring continuity between the
connections shown on the wiring diagram (Fig.
2, page 11) is readily verified. This is best done in
stages, removing only those wires required for each
continuity check. As each lead is replaced, it should
be checked for evidence of corrosion, and cleaned if
necessary. All leads must be tightly attached so as to
provide a good electrical connection.
MAINTENANCE
WARNING:
DO NOT HOSE DOWN UNIT AS IT
CONTAINS ELECTRICAL COMPONENTS.
GENERAL:
This section contains both preventive and corrective
maintenance information. Preventive maintenance
may be performed by maintenance personnel at the
establishment in which the cooker is installed. It is
recommended that user personnel never attempt to
make repairs or replacements to the equipment with-
out the assistance of authorized service. Assistance
in service methods or a current Directory of Autho-
rized Agencies may be obtained from Market Forge
(Refer to service section on page 1).
PREVENTIVE MAINTENANCE:
A good preventive maintenance program begins with
the daily cleaning procedure described in the cleaning
section on page 4. Additional preventive maintenance
operations are presented in this section. In establish-
ments that employ full-time maintenance personnel,
the tasks described can be assigned to them. For oth-
er installations, tasks requiring mechanical or electri-
cal experience should be performed by an authorized
service agency.
