Gas-Fired Products 175 Manuale Utente

 

 Form 

#43343530 

 

–44– 

JJuly 08

 

 
 
 
 
 
 
 
 
 
 

 

 
 

Check external thermost

at 

w

iring 

and

thermost

at set point.

No

Ye

s

Remove red wire from the Low fire terminal, 

is 

there 

24V

at the center C terminal?

No

Ye

s

Is 

there 

24V 

at 

the 

HI

terminal on the gas valve?

No

Ye

s

With the thermost

at

set to low fire only does the low fire amber light come on af

ter 15 seconds?

No

Ye

s

Is 

there 

24V 

between

the thermost

at

terminal 

block 

low 

fire

cont

act and ground?

No

Ye

s

Check terminal connections, is the yellow wire connected 

to 

the 

high

fire terminal?

Check external thermost

at 

w

iring 

and

thermost

at set point.

Switch terminal connections. 

Red 

wire

LO should be connected to ignition module W (TH) terminal.

Rep

air terminal

connections. 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.

No

Ye

s

Does the low fire amber light st

ay on

past 10 seconds?

No

Ye

s

Check the micro Amp

s at the FC-FC+

terminals of the module is it greater than 

0.7µA

 with 

flame.

Turn on the gas valve?

Does LED on the ignition module flash three times?

Replace ignition module.

Check flame sense wire does it have continuity?

Cont

act factory for

assist

ance.

Replace flame sense wire.

Adjust terminal connection. Rest

art

troubleshooting.

No

Ye

s

Is 

the 

knob 

on 

the 

gas

valve turned to the ON position?

No

Ye

s

Through the inspection window is there a flame visible during st

art up?

No

Ye

s

Is 

the 

heater 

properly

grounded?

Correct grounding problem.

No

Ye

s

Check 

the 

terminal 

on

the flame sense electrode, is it tight?

No

Ye

s

Remove and inspect flame sense electrode. Is it clean and the ceramic int

act?

Rep

air or replace

flame sense electrode.

See next p

age for

troubleshooting sequence.

No

Ye

s

Replace ignition module.

No

Ye

s

No

Ye

s

Is 

there 

24V 

at 

the 

HI

terminal on the gas valve?

No

Ye

s

Does the high fire amber 

light 

come 

on?

No

Ye

s

Is the there 24V between the thermost

at terminal

block 

high 

fire 

cont

act

and ground (yellow wire)?

No

Ye

s

Check terminal connections to the gas valve, are they tight?

Check the red wires C should be connected 

to 

the 

TISS

and LO connected to W (TH) module terminal.

Rep

air terminal

connections.

Rep

air terminal

connections. 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.