Heater Testing - Napoleon BEF33H Service Manual

4.3.2

HEATER TESTING

THIS SECTION REQUIRES THE APPLIANCE AND THE HEATER TO STAY TURNED ON. DO NOT
UNPLUG ANY CONNECTIONS WHILE PERFORMING THE STEPS OF THIS SECTION.
Ensure power supply
connections are in.
Refer to section 3.0
NO
(Wiring Diagram)
Replace PCB.
Refer to section 5.6
(Control Board
NO
Replacement)
Replace high limit
switch.
Refer to section 5.12
(High Limit Switch,
NO
Heater, and Blower
Replacement)
Replace wire
harness
NO
20
EN
W415-1696 / 10.12.16
RISK OF ELECTRICAL SHOCK.
START HERE
Turn appliance on using
the rocker switch
Set multimeter to read
AC voltage
Place the negative probe on
the AC-N terminal on the PCB
(Figure 14)
Place the positive probe on
the COMM terminal on the
largest relay of the PCB
(Figure 15)
Is the voltage reading
approximately 120V AC?
YES
Place the positive probe
on the N.O. terminal on the
largest relay of the PCB
(Figure 16)
Press the heater
button and wait 8 seconds
Is the voltage reading
approximately 120V AC?
YES
Place the positive probe
on the right terminal of
the high limit switch
(Figure 17)
Is the voltage reading
approximately 120V AC?
YES
Place the postive probe
on the left terminal of the
high limit switch
(Figure 18)
Is the voltage reading
approximately 120V AC?
YES
WARNING
!
Place the positive probe on the rear
left terminal of the heating element
(Figure 19)
Is the voltage reading
approximately 120V AC?
Place the positive probe on the front
left terminal of the heating element
(Figure 20)
Is the voltage reading
approximately 120V AC?
Remove the negative probe on the
AC-N terminal and place it on the
right terminal of the heating element
Is the voltage reading
approximately 120V AC?
Set a clamp multimeter to read
amperage and clamp around
wire #3 (Figure 21)
Is the amperage reading
approximately 10A?
Replace wire #3 on the
right side of the heater
Replace wire
NO
YES
Replace wire
NO
YES
Replace the heater.
Refer to section 5.12
(High Limit Switch,
NO
Heater, and Blower
YES
Replace the heater.
Refer to section 5.12
(High Limit Switch,
YES
Heater, and Blower
NO
harness
harness
Replacement)
Replacement)