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SECTION 5 TROUBLE-SHOOTING
5.1 General
The information in this section is intended to assist both
the operator and service personnel in locating the general
source of problems that may occur with the cooker. Before
following any of the procedures given in this section, the
operator should be thoroughly familiar with the operating
instructions and the function of all controls that are
described in Section 3. If the problem cannot be readily
corrected, the operator should contact the nearest Market
Forge service agency for assistance.
5.2 Trouble-Shooting Guides
A trouble-shooting guide for use by service personnel is
given in Table 5-1.
PROBLEM
1. INDICATOR LIGHT FAILS TO
LIGHT WITH TIMER SET.
2. STEAM FAILS TO ENTER
COOKING COMPARTMENT WITH
INDICATOR LIGHT ON.
3. STEAM ENTERS COMPARTMENT
CONTINUOUSLY. TIMER DIAL NOT
TURNING.
4. STEAM CONTINUES TO FLOW
INTO COMPARTMENT AND/OR
BUZZER FAILS OT SOUND AT
END OF TIMER SETTING.
5. STEAM FLOWS CONTINUSLY
FROM BOILER (
OR DIRECT CONN-
) DRAIN LINE
ECTED STEAM CONTROL
WITH COOKER IN OPERATION.
TABLE 5-1 GENERAL TROUBLE-SHOOTING GUIDE
PROBABLE CAUSE
a. Power to Cooker OFF.
b. Door Interlock Switch contacts
not closed.
c. Door Interlock Switch faulty.
d. Indicator Light burned out.
e. Faulty Timer contacts.
f. Faulty Wiring.
a. Faulty Steam Solenoid Valve.
b. Faulty Wiring.
a. Constant Steam Position.
b. Faulty Thermostatic Switch.
c. Faulty Timer Motor.
d. Faulty Steam Solenoid Valve.
e. Faulty Wiring.
a. Timer Contacts Faulty.
b. Buzzer Faulty.
c. Faulty Wiring.
a. Cold water not connected.
b. Faulty Thermostat.
c. Faulty Cold water.
d. Faulty Wiring.
5.3 Electrical Fault Isolation
Correction of an electrical failure first requires isolation of
the fault to a single circuit or component. In most cases,
the nature of the failure and its effect upon the operation of
the cooker will be sufficient to narrow it down to one or
more circuit elements. Table 5-2 is provided as a guide for
isolating electrical faults.
5.4 Electrical Trouble-Shooting Procedures
Before performing the trouble-shooting procedures in this
section, the serviceman must be familiar with the function
of all controls as described in Section 3 as well as with the
Principles of Operation described in Section 4.
a. Locate External Circuit Breaker for
incoming power & place in ON position.
b. Shut cooker door to close switch contacts,
Check alignment of door with switch.
c. Replace Switch (see subsection 5.4.4).
d. Replace Light.
e. Replace Timer (see subsection 5.4.3).
f. Inspect condition od wire & tightness of all
connections, Correct as needed.
a. Replace Valve (see subsection 5.4.5).
b. Inspect condition od wire & tightness of all
connections, Correct as needed.
a. Move knob to timing location.
b. Replace Switc (see subsection 5.4.7).
c. Replace Timer (see subsection 5.4.3).
d. Replace Valve (see subsection 5.4.5).
e. Inspect condition od wire & tightness of all
connections, Correct as needed.
a. Replace Timer (see subsection 5.4.3).
b. Replace Buzzer (see subsection 5.4.8).
c. Inspect condition od wire & tightness of all
connections, Correct as needed.
a. Turn on external shut-off valve.
b. Replace Thermostat (see subsection 5.4.7).
c. Replace Valve.
d.
Inspect condition od wire & tightness of all
connections, Correct as needed.
5-1
REMEDY
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