Broaster 1600, Service Manual

Page: 69 / 131

5-2
CONTACTORS (1600/1800E)
Primary contactor (1) is controlled by the
cook/filter switch. This contactor opens if
hi-limit opens. Secondary contactor (2) is
controlled by the thermostat control (1600
mechanical) or the solid state controller.
1. See ACCESS FOR SERVICE.
Check oil level before
turning cook/filter switch
to COOK.
2. Connect main power supply.
3. Turn cook/filter switch to COOK. You
should hear an audible snap followed
by another shortly after the first.
4. Check voltage through primary con-
tactor (1) using a voltmeter. For single
phase, check across two outside con-
nections opposite applied voltage
wires. Meter should indicate 208 or
240 volts. For three phase, check
across any two of three connections.
Meter should indicate 208 or 240 volts
across all combinations. If not, cook/
filter switch, contactor, main power
supply, hi-limit open or power cord
may be faulty.
5. Check voltage between any two of the
three connections opposite element
wires on secondary contactor (2). Any
great drop in voltage indicates a poor
connection or dirty contact within the
contactor.
6. Secondary contactor (2) will close
when HEAT ON light is illuminated.
Make same checks as in step 4
between any two of the three connec-
tions on element wire side of contac-
tor. Any drop in voltage indicates a
poor or dirty contact within the con-
tactor.
7. Disconnect main power supply.
8. If either contactor will not close electri-
cally, check coil (3) with an ohmmeter.
With needle nose pliers, disconnect
wire(s) from one side of the coil. Meter
should indicate a closed circuit. If not,
coil is faulty.
Replacement:
1. See ACCESS FOR SERVICE.
2. Remove all wires from the contactor.
3. Remove two mounting screws.
Remove contactor.
4. Install new contactor in reverse order.
Be sure all wire connections are
secure and in their original location.
See wiring diagram.
broaster.com Manual #14680 3/99 Rev 5/14