TROUBLESHOOTING
Ve ct or™ H Se ries ▪ S ervice Ma nual ▪ MN -4 6 54 3 ▪ R ev 01 ▪ 11/ 19
89
The Chamber is Slow to Heat
Before you begin Remove the left service panel. Locate the power wires to the blower motor to be
tested. Place an ammeter on one of the power wires to the blower motor.
WARNING: Electric shock and arc flash hazard.
Use caution when measuring line voltage.
Wear Personal Protective Equipment (PPE).
NOTE: The chamber blower fans must operate if the blower fans do
not operate. See topic Chamber Blower Fans do not Operate.
NOTICE
Do not operate the oven in a cooking mode for an extended
period of time with the top panel 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 top
panel removed.
Navigate to the service screen. Touch the blowers
icon. Touch the motor speed for the motor to be
tested. Change the motor speed to 100% and touch
the check mark.
Is the amperage reading above 1 amp?
No
The blower motor maybe running
backwards.
Locate the VFD for the blower motor
being tested.
Locate the wire harness from the
VFD to the terminal blocks. This
harness has 1 small diameter white
wire 1 larger diameter white wire, 1
black wire and 1 green/yellow
striped wire. Locate the small
diameter white wire.
Inspect the connection of the small
white wire into the terminal block.
The small white wire needs to be in
L1 terminal block only.
Reconnect as required.
Yes
The blower motor is working properly.
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