BENSON OLYMPIC WH - Page 29

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-

I

6.0 Fault

Diagnosis

Fig 19

'---

1

I

I

I

Ch

eck Fuses

r--

I

I

I

Check for

'----

No

Power

Check Main Check

On

/ Off

Isolator Switch

I

Lockout

Burner fails

I

I--

to run

I

Check

I

~

~

Thermostat

I

I

I

Check Timer

I

I--

I

No

Demand

Check for

I

Check Air

Signal

Overheat

,--

Pressure Switch

Check Voltage

Check Flame

-

r--

Probe

Check Control I Check Burner

-

Box

and

Burner

Motor

Fig

20

Ensure Start Gas

Ch

eck Gas Ensure Gas Cock

Valve

Opens

is

Open

,-

Supply

I

I

I

II

Purge

Air

Air in Gas Feed

I

I

I

Fan starts but

burner

goes

to

I--

II Check as

per

I--

lockout

Burner

manual

r--

I

I

1

Faulty Air

I

r--

Pressure Switch

I

I

!

I

I

i

Check

HT

Lead

Ignition Failure Faulty Ignition

-

and

Connector

Transformer

Check

Gap

Faulty Electrode

'

r--

Check Insulation

Control Box

'----

'---

Fault

Check Control

t---

Box

-

28

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