Specifications

ManualsBrandsMonitor ManualsHeating SystemM2400

RESULT

CHECKS

RESULT

FLAME

ROD

BYPASS

CIRCUIT

For

testing

purposes

— A flame

detector

rod

bypass

circuit

can be

made

up,

consisting

of 2

insulated

alligator

dips,

2-6'

pieces

of

insulated

copper

wire,

1-1

ampere

400

volt

diode,

and

1-1/4 watt

100K

OHM

resistor.

These

components

are to be

soldered together

in

sequence

as

shown

in

diagram

below (note component

and

polarity).

Once

the

bypass

circuit

is

made

the

unit

is

turned

on,

immediately

after

the

prepurge

preheat cycle; when mode

light

comes

on, the 0 and N

pins

are

disconnected

off the

PCB

and

replaced

with

the

bypass

circuit

The

unit

should then continue

functioning

as

though

it had a

good

flame

inside

the

bum

chamber

and

service tests such

as

fuel flow

can be

checked.

(Note-WARNING.

after

all

tests

are

completed, replace

original

flame rod

wires

as

it is a

vital

safety feature.)

m-

CLIPS

CUPS

REASON

CORRECTIVE

MEASURE

Failure

of

resistor.

(R25-R28)

Failure

of

transformer-!.

Failure

of

capacitor.

(C15-C17)

Replace

transformer-!.

Failure

of

resistor.

(R23.R30-R32)

Failure

of

resistor.

(F136,

R78)

Failure

of

capacitor.

(C33)

Failure

of

diode.

{D16,

D18)

Failure

of

transistor

array.(IClO)

Failure

of

resistor.

(R33,

R35)

Failure

of

microprocessor.(lCl)

Failure

of

wiring

for flame

sensor

and

ground.

Incorrect

installation

of flame

sensor

rod.

Correct

wiring.

Correct

installation.

Failure

of

comparator.(IC8)