OPERATIONAL CHECKS (continued)
4
211 502972 SvcManual for BWB-1S Belgian Waffle Bakers
D. VOLTAGE CHECKS
1. Voltage between temperature controller terminals 2 & 3will be
120V any time the power switch (item 66) is turned ON. Absence of
120V indicates power switch OFF or defective, or a wiring or
connector problem.
2. Voltage between TP1 and TP2 will be 120V when the unit is calling
for heat. Absence of 120V, when heating is required, indicates:
a.) Power switch defective or OFF; or,
b.) Temperature controller defective or open temperature probe;
or,
c.) Wiring or connector problem
3. Voltage between TP1 and TP2 will be 120V when the unit is calling
for heat. Failure to heat when 120V is present indicates that the
element being tested is defective.
4. Voltage between temperature controller terminals 1 & 3 will be
120V when the temperature controller is calling for heat. Absence
of 120V, when heating is required, indicates:
a.) Power switch defective or OFF; or,
b.) Temperature controller defective, or
c.) Shorted temperature probe or probe wiring shorted
(check between terminals 4& 5); or,
d.) Wiring or connector problem
5. TP3 and TP4 are found only on waffle bakers equipped with a hi-
limit thermostat. The hi-limit thermostat should be removed and
bypassed to increase the reliability of the waffle baker.
6. Voltage between timer terminals 2& 3is 120V any time the power
switch is ON. Absence of 120V indicates:
a.) power switch defective or OFF; or,
b.) a wiring or connector problem
7. Voltage between timer terminals 5& 6is 0V when the microswitch
(item 10) is activated. Any voltage other than 0V indicates a
defective microswitch, or a wiring or connector problem.
8. Voltage between timer terminals 1& 2 is 120V during the cook
cycle. Absence of 120V indicates a defective timer module.
9. An indicator light NOT lit when reading a voltage between timer
terminals 1& 2 is 120V indicates:
a.) loose or defective wiring to the indicator light; or,
b.) defective indicator light
10. Voltage between timer terminals 2& 4is momentarily 120V at the
end of the cook cycle.
Absence of 120V indicates a defective timer module.
CAUTION:
ELECTRIC SHOCK
HAZARD
Live electric circuits may
be exposed during these
procedures. Take necessary
precautions to avoid electric
shock.
CAUTION:
BURN HAZARD
HOT SURFACES
Equipment surfaces may be hot
during these procedures. Take
necessary precautions to
avoid burns.
NOTE: Resistance of the
temperature probe is
typically 5 megohm at room
temperature, with resistance
decreasing as temperature
rises.
• A shorted temperature
probe will cause a
runaway condition.
• An open probe will cause
a continuous OFF
condition.
NOTE:
Newer waffle bakers do not
use a hi-limit thermostat.
Existing hi-limit thermostats
may be safely removed and
bypassed without affecting
the UL approval.
See page 10.
