Section 5 Trouble-Shooting; General; Trouble-Shooting Guides; Electrical Fault Isolation - Market Forge Industries ST-10 Owner's Manual

SECTION 5. TROUBLE-SHOOTING

5.1 GENERAL

The information in this section is intended to assist
both the operator and service personnel in locat-
ing the general source of problems that may occur
with the cooker. Before following any of the proce-
dures 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 cor-
rected, 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 per-
sonnel is given in Table 5-1.
PROBLEM
Indicator light fails to light with
timer set.
Steam fails to enter cooking
compartment with indicator light
on.
Steam enters compartment
continuously. Timer dial not
turning.

GENERAL TROUBLE-SHOOTING GUIDE

PROBABLE CAUSE
a. Power to cooker off.
b. Door interlock switch con-
tacts 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.

5.3 ELECTRICAL FAULT ISOLATION

Correction of an electrical failure first requires
isolation of the fault to a single circuit or compo-
nent. 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 iso-
lating electrical faults.

5.4 ELECTRICAL TROUBLE-SHOOTING

PROCEDURES

Before performing the trouble-shooting proce-
dures in this section, the serviceman must be fa-
miliar with the function of all controls as described
in Section 3 as well as with the Principles of Op-
eration described in Section 4.
Table 5-1
13
REMEDY
a. Locate external circuit break-
er for incoming power and
place in ON position.
b. Shut cooker door to close
switch contacts. Check align-
ment of door with switch.
c. Replace switch. See subsec-
tion 5.4.5.
d. Replace light.
a. Replace valve. See subsec-
tion 5.4.6.
b. Inspect condition of wire and
tightness of all connections.
Correct as needed.
a. Move knob to timing loca-
tion.
b. Replace switch. See subsec-
tion 5.4.8.
c. Replace Timer. See subsec-
tion 5.4.4.
d. Replace valve. See subsec-
tion 5.4.6.
e. Inspect condition of wire and
tightness of all connections.
Correct as needed.