Alto-Shaam Combitherm CT PROFORMANCE Series Service Manual

MN-35949
•
Rev 07
•
01/20
•
Combitherm® CT PROformance™ and CT Classic™ Series Technical Service Manual
•
81
Troubleshooting
Classic: No Low Speed Convection Motor Operation(E03/E04)
Does the motor fan wheel spinfreely?
No
Remove the obstruction and/or replace the convection motor
as needed.
Yes
Is the K51 low speed contactorbeing energized?
No
Determine which leg of power is missing and correct:
• A1 is L1 supplied from the Control Board(CB) terminalX01
pin3 through the N/C contacts 21/22 on the K50
contactor(K51 will not energize if K50 is energized).
• A2 is L2 supplied from K50 A2 which is supplied
terminalblockTB 27-19.
Yes
Is the K51 contactorclosing?
No
Replace the faulty contactor.
Yes
Is there line voltage across terminals 1/3/5 on the K51
contactor?
No
Test for blown F4/F6/F7 fuse(s) and/or repair the wiring issue
between the fuses, K50, or K51 contactors.
Yes
Is there line voltage across terminals 2/4/6 on the K51
contactor?
No
Replace the faulty contactor.
Yes
Is there line voltage across the black/blue/brown wires at
the convection motor?
No
Repair the wiring issue between the K51 contactorand the
convection motor.
Yes
Is the convection motor running?
No
Replace the faulty convection motor and the capacitors
as applicable.
Yes
The low speed convection motor is operating.

Alto-Shaam Combitherm CT PROFORMANCE Series Specifications

General

Brand	Alto-Shaam
Model	Combitherm CT PROFORMANCE Series
Category	Oven
Language	English