Troubleshooting - Wells BWB-1S Service Instructions Manual

B. TEMPERATURE CHECKS
1. Desired baking temperature is 390ºF ±5ºF (200ºC ±3ºC).
2. Turn the power switch
a minimum of 30 minutes. Insert a pyrometer of known accuracy
betwen the grids and allow the readings to stabilize.
3. Temperature may be adjusted by removing the back panel,
and turning the dial on the temp controller:
CW to decrease temperature; CCW to increase temperature.
NOTE: Manufacturer' s calibration point (390ºF) is indicated by a black dot on the face of the dial.
A. ELECTRICAL TEST POINTS
TP1
TP3
ELEMENT / GRID
bottom shown - top similar
B. AMPERAGE AND RESISTANCE CHECKS
1. Amperage may be checked with an inductive amperage tester (Amprobe™ or similar) by encircling
wire #4 at temperature controller terminal 2. Total amperage is 7.5 Amps with the waffle baker in
the pre-heat mode.
2. The heating element is integral with the Grid casting.
Disconnect wire #7 to #8 from temperature controller to check resistance of both grids at once.
Resistance from # 7 to #8 is 16 (cold) ± 1
or a broken element jumper wire.
Data for one element: 450 Watts, 3.8 Amps
Resistance of one element TP1 to TP2, (wires disconnected) is 32.0 (cold) ± 1
TROUBLE SHOOTING
CAUTION: ELECTRIC SHOCK HAZARD
Live electrical circuits are exposed
during troubleshooting procedures
CAUTION: BURN HAZARD
Equipment surfaces will be hot
during troubleshooting procedures
and allow the Waffle Baker to heat for
ON
TP2
TP4
TEMPERATURE CONTROLLER
test points are terminals
A reading of 32.0 indicates one defective element
4
390ºF
CALIBRATION
POINT
TIMER MODULE
test points are terminals