Roberts Gorden DAT75 Manual Do Utilizador

35

Replace

combination thermostat.

Wiring faulty or faulty

combination thermostat.

Investigate.

If problems persist, contact

ROBERTS GORDON

®

 at

Tel: +44(0) 190 249 8733

or www.rg-inc.com

Relay R3 faulty.

Replace.

Does fan run at cooling

stage 2 (T12 live)?

No

Does fan run at cooling

stage 1 (T11 live)?

Yes

No

No

Replace or tighten belts.

Transpose two incoming

phase connections.

Is fan/motor rotation

correct?

No

Overload Faulty

Replace.

Are fan belts

loose or broken?

Yes

No

No

Yes

Has fuse 1 on the

printed circuit board

blown?

No

Yes

No

Yes

Press in overload reset

button and retest.

Fan Operating

No

Does fan run when white

button of combination

thermostat is pushed in?

Fault elsewhere

Is power supply 400v at

three phase and N at the

 main terminal?

No

Yes

No

No

Yes

Does main fan run

automatically

in heating mode?

No

Is there 230v at contactor

coil terminal A1 and A2?

Does fan motor run with

little or no air flow?

Yes

Yes

No

Is there 230v between

terminals 96 and A1 on

the contactor?

Contactor faulty.

Replace.

Replace fuse and

investigate.

Yes

Overload operated. Check for

three phases at mains

terminals, loose electrical

terminals and motor overload.

Check filters and

ducting for blockage.

Does fan run

as burner fires?

No

Yes

Relay R1 faulty.

Replace.

Yes

Does main fan run

automatically

in cooling mode?

Relay R2 faulty.

Replace.

Yes

For your safety and optimum heater performance use only ROBERTS GORDON

®

 replacement parts.