SECTION 5. TROUBLE-SHOOTING
5.4.10 COLD WATER CONDENSER CIRCUIT
If during cooker operation steam exits from the
drain line opening (
located in lower boiler com-
partment
) 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 so-
lenoid coil, or by wiring failure. To test condenser
thermostat, refer to Subsection 5.4.8.
If the condenser thermostat functions correctly,
but either 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 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. Defective valve coils
are separately replaceable.
5.4.11 WIRING
All of the electrical components of the cooker (
tim-
ers, indicator lights, etc.
) are connected to each
other by wiring shown in Figure 5-1. If all of the
electrical components are operating correctly (
and
the incoming power has been checked
), but the
cooker fails to operate, the fault lies in the wiring.
Figure 5-1 is a diagram that shows all terminals
and interconnections within the electrical circuits.
All numbered terminals are identified and all leads
number coded as shown. Connections can be
easily removed. Figure 5-2 shows the same in-
formation schematically and is an aid in isolating
circuits for testing.
Using an ohmmeter, wiring continuity between the
connections shown on the wiring diagram (
Figure
5-1
) is readily verified. This is best done in stages,
removing only those wires required for each conti-
nuity 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.
MODEL ST-10 ONLY
Figure 5-2 ST-10 Schematic Diagram
18
