TROUBLESHOOTING
Ve ctor F® Se ries ▪ S ervice Ma nual ▪ M N- 46 89 5 ▪ R ev 1 ▪ 7/ 20
90
Chamber Blowers do not Operate
Before you start ▪ Put the oven into a heating mode.
▪ Locate the circuit breakers and reset any tripped circuit breaker as required.
WARNING: Electric shock and arc flash hazard.
Use caution when measuring line voltage.
Wear Personal Protective Equipment (PPE).
NOTICE
Do not operate the oven in a cooking mode for an extended
period of time with the service panels removed. Damage to the
electronics may occur without adequate cooling airflow.
An auxiliary fan must be used if the oven will be operated in a
cooking mode for an extended period of time with the service
panels removed.
Measure the AC voltage
across the white and black
electrical power input wires
to the VFD. Does the voltage
correspond to the voltage
printed on the serial number
tag?
No
Repair or replace the wires
or relay supplying electrical
power to the VFD.
Yes
Turn the oven off. Locate the
following connectors on the
control board P2, P12, P13,
P14. Swap the connector for
the inoperable chamber with
a connector for an operable
chamber. Turn the oven on.
Test the blower operation.
Did the inoperable blower
move to the other chamber?
No
Turn the oven off. Re-install
the P2, P12, P13, P14
connectors to their original
positions. Proceed to the
next step below.
Yes
Inspect the wires from
connector P2, P12, P13, P14
to the VFD, repair any
damaged wires or
connectors.
Replace the control board.
Locate the two VFD to
motor connectors. Swap
the two VFD to motor
connectors for the
inoperable chamber with
two VFD to motor
connectors for an operable
chamber. Turn the oven
on. Test the blower
operation. Did the
inoperable blower move to
the other chamber?
No
Inspect the wires and
connectors. Repair any
damaged wires or
connectors.
Replace the blower
motor.
Yes
Inspect the wires and
connectors. Repair any
damaged wires or
connectors.
Replace the VFD.
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