Turbo Chef Technologies 3240 Troubleshooting F10 Air Pressure Switch Fault, Are all the contacts

4 0 T RO U B L E S H O OT I N G

Troubleshooting:

F10: Air Pressure Switch Fault

Does the burner trans-

Are all the contacts

former have line voltage

Is the output of the burner

on the high limit

YES

NO

transformer 24 VAC (page

applied to input

thermostat closed?

28)?

(208-240 VAC)?

NO

YES

YES

Is the air pressure

switch closed?

Replace the burner

Investigate the reason for

transformer

YES

the high limit tripping. If

(page A-8).

the thermostat is defective,

NO

replace it (page A-14).

Replace the

I/O control

Is the combustion

board

YES

Is line voltage

blower running?

Is the wiring

(page A-8).

applied (208-240

YES

correct

NO

(page 45)?

Correct wiring

VAC) to the

NO

NO

(page 45).

BMSC (page 25)?

Is the air tube

connected tightly?

YES

Replace the combustion blower (page A-14).

NO

YES		NO
Replace the	Replace the
air switch	air tube.
(page A-14).
Check the
wiring
(page 45).

Replace the K3 relay (page A-8).

Replace the I/O

control board NO (page A-8).

YES

Is coil voltage (24 VDC) applied to the K3 relay (page 22)?

NO

Are the K3 relay contacts closed?

YES

Check the wiring (page 45).