Gas-Fired Products 175 사용자 설명서

Form #43343530 

 

 

July 08 

–43– 

 

22.0) TROUBLESHOOTING 

GUIDE 

 

 

 
 
 

Turn on the gas valve?

No

Ye

s

Is 

the 

knob 

on 

the 

gas

valve turned to the ON position?

No

Ye

s

Are the blue wires secure in the terminals and firmly on the ignition module terminals?

Move orange wire to NO terminal. Rest

art

troubleshooting.

Replace motor

.

Remove any obstructions. Repeat st

art up. If motor will

not run. replace motor

.

No

Ye

s

Disconnect 

the 

power

and 

check 

the 

blower

wheel. Does it turn freely?

No

Ye

s

During st

art up, is

there 120V between ground and the IND terminal on the module?

Clean out hoses and probes.

Switch hoses on the pressure t

ap

s.

Check 

NO 

terminal 

of

the air switch connection. Replace red light.

No

Ye

s

Turn on line volt

age

and 

adjust 

thermost

at

to 

the 

highest 

setting.

Does the red monitoring 

light 

come

on?

No

Ye

s

Does the blower come on?

No

Ye

s

Does the LED on the ignition module flash once?

No

Ye

s

Is 

the 

black 

tap 

on 

the

air switch connected to the upper probe?

Check 

the 

probes 

and

hoses 

to 

the 

air 

switch

are they clear and unobstructed?

Replace air switch.

No

Ye

s

Is 

120V 

at 

the 

terminal

block in the blower?

Check line volt

age

circuit. Rep

air fault.

No

Ye

s

Is there 120V between ground and the 

L1 

terminal 

on 

the

module?

No

Ye

s

Check terminals for continuity and rep

air

.

No

Ye

s

Is the LED on the ignition module steady ON?

No

Ye

s

Is 

there 

24V 

between

the inlet to the fuse carrier and the ground?

No

Ye

s

Is there 24V on the other side of the fuse carrier?

No

Ye

s

Is 

there 

24V 

between

both terminals of the TISS and ground?

No

Ye

s

The 

TISS 

has 

broken

continuity

. Check the

first 

tube 

and 

reflector

is there a hole?

Check 

TISS wire for

a 

break 

if 

it 

is 

close 

to

the terminal rep

air

.

Otherwise replace TISS wire.

Replace heat exchanger tube, reflector and 

TISS.

No

Ye

s

Is 

there 

24V 

between

both terminals of the thermost

at 

connection

and ground?

No

Ye

s

Does 

the 

system 

have

a 24V individual thermost

at?

No

Ye

s

Is 

120V 

at 

the 

terminal

block in the blower?

Check 

that 

red 

wire 

is

connected 

to 

TH 

from

air switch terminal C. Rep

air connection.

Replace ignition modules.

Rep

air or replace

jumper check all wire terminals.

Rep

air or replace

thermost

at. Check

external wiring.

Replace ignition module.

Check terminals for continuity at transformer

. If they

are good, replace transformer

.

if fuse carrier is tight and the fuse has no continuity

, replace 

the

fuse.

No

Ye

s

Does the blower st

ay

on?

No

Ye

s

Does the LED on the ignition module flash once?

No

Ye

s

Is the orange wire from 

PSW 

connected

to 

the 

NO 

terminal 

of

the air switch?

No

Ye

s

Are air switch terminals jumpered?

Remove jumper

, air

switch must be open circuit first for blower to operate.

Air switch is stuck in the closed position. Replace air switch.

Move black light wire to NO terminal of the air 

switch. 

Rest

art 

the

troubleshooting.

No

Ye

s

Does the low fire amber 

light 

come 

on?

No

Ye

s

Is the LED on the ignition module steady ON?

No

Ye

s

Af

ter 15 seconds

post purge is there 24V 

between 

V1 

and

V2 ignition module terminals?

Replace ignition module.

Replace ignition module.

Rep

air connection.

Rest

art

troubleshooting.

No

Ye

s

Are the black wires to the amber light securely on the gas valve terminals?

Rep

air connection.

Rest

art

troubleshooting.

Replace amber light. Rest

art

troubleshooting.

Troubleshooting continued 

on 

the 

next

page.