Owner's manual

402s Ovens Pt. No. 32Z3522 Issue 6

PRINCIPAL COMPONENTS: Hot Air Motor & Controller 1

Convection and Fan Speed Control

The convection heat is provided by 5 elements located in the hot box at the rear of the oven

cavity. The hot air from the hot box passes over catalytic converters and is circulated into the

bottom and top of the cavity through the impinger plates. It returns through the removable grease

filter at the back of the cavity and into the fan.

Convection motor

The convection motor Is a 3-phase AC motor having a maximum speed of 7200 rpm controlled by

a motor speed controller.

The windings are thermally protected and in the event of a thermal fault a trip will operate and

shut down the motor speed controller.

Step Motor/ controller fault finding

1 208V/240V, 60Hz Electrical supply into motor controller

2 Three phase connections to motor

3 Speed Controller connections to logic board

4 Motor thermal cut-out (short circuit)

5 Motor rotates freely/ not seized

6 Motor winding resistances:

Blue-Black 3 Ohms—4 Ohms

Black-Brown 3 Ohms—4 Ohms

Brown-Blue 3 Ohms—4 Ohms

Black or Brown or Blue to Earth (Open circuit)

8x 31Z4016

M5 Flange nut

No. Description Part No.

Heater Element 208V 650W 68Ω

DV0328

Heater Element 240V 650W 88Ω

DV0337

20A Heater Element Collar DV0058

23 Convection ( Hot Air ) Motor Assembly SA208

Gasket Set SA332