Alto-Shaam Vector VMC-F3E Service Manual

TROUBLESHOOTING
Ve ct or F ® Se ries ▪ S ervice Man ual ▪ MN -4 6 895 ▪ R ev 1 ▪ 7/ 20
87
The Chambers do not Heat – Element Line
Voltage
How the heating
element line voltage
works
The heating elements require two phases of line voltage to operate. One phase
originates at the main disconnect switch and is connected through a terminal
block and then directly to the heating element. The second phase originates at
the main disconnect switch and is connected through a terminal block, circuit
breaker, chamber high limit switch and then to a solid state relay (SSR). The SSR
controls the on time of the second phase of line voltage to the heating element.
Before you start
▪ Read and follow the steps described in the topic The Chambers do not Heat—
Element Control Voltage.
▪ At the main disconnect switch, determine which phase connects directly to the
heating element, and which phase connects to the L1 terminal of the SSR.
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 for the heating
elements to operate. Confirm that the blower fan is operating
correctly. 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 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.
At the main disconnect switch, measure the AC voltage
across the two phases for the heating element that is
not working
Does the voltage correspond to the voltage printed on
the serial number tag?
No
Determine the cause of the
incorrect line voltage. Repair or
replace as required.
Yes
Insert one meter lead into the wire connector at the
heating element. At the main disconnect switch, place
the second meter lead on the phase that connects to
the SSR. Measure the AC voltage across the two phases.
Does the voltage correspond to the voltage printed on
the serial number tag?
No
Repair or replace the wiring for
the phase that connects directly to
the heating element.
Yes

Alto-Shaam Vector VMC-F3E Specifications

General

Brand	Alto-Shaam
Model	Vector VMC-F3E
Category	Oven
Language	English