Gas-Fired Products 150, N7/L7, 100, 40, 175, 200 manual Form #43343530 JJuly

–44–

Does the high fire

Is the there 24V

Check terminal

Is there 24V at the HI

Are the black wires

Replace amber light.

amber light come on?

between the

connections to the

terminal on the gas

to the amber light

Restart

No

thermostat terminal

Yes

gas valve, are they

Yes

valve?

Yes

securely on the gas

Yes troubleshooting.

block high fire contact

tight?

valve terminals?

and ground (yellow

wire)?

No

No

No

Repair terminal

Repair terminal

Repair connection.

connections.

connections. Restart

Restart

troubleshooting.

troubleshooting.

No

Remove red wire

Check external

from the Low fire

thermostat wiring and

terminal, is there 24V

Yes thermostat set point.

at the center C

terminal?

No

Check the red wires

C should be

connected to the TISS

and LO connected to

W (TH) module

Yes

terminal.

Does the low fire

Is the knob on the gas

Through the

See next page for

amber light stay on

valve turned to the

inspection window is

troubleshooting

past 10 seconds?

No ON position?

Yes

there a flame visible

No

sequence.

during start up?

No

Yes

Turn on the gas

Does LED on the

Is the heater properly

Check the micro

Replace ignition

valve?

ignition module flash

grounded?

Amps at the FC-FC+

module.

three times?

Yes

Yes

terminals of the

Yes

module is it greater

than 0.7µA with flame.

No

No

No

Replace ignition

Correct grounding

Check the terminal on

Remove and inspect

Check flame sense

Contact factory for

module.

problem.

the flame sense

flame sense

wire does it have

assistance.

electrode, is it tight? Yes

electrode. Is it clean

Yes

continuity?

Yes

and the ceramic

intact?

Yes
With the thermostat		Is there 24V between	Check terminal	Is there 24V at the HI
set to low fire only		the thermostat	connections, is the	terminal on the gas
does the low fire	No	terminal block low fire Yes	yellow wire	Yes valve?
amber light come on		contact and ground?	connected to the high
after 15 seconds?			fire terminal?

	No	No	No
	Adjust terminal	Repair or replace	Replace flame sense
	connection. Restart	flame sense	wire.
	troubleshooting.	electrode.
	Are the black wires	Replace amber light.
	to the amber light	Restart
Yes	securely on the gas	Yes troubleshooting.
	valve terminals?

Form #43343530 JJuly 08

Yes

Troubleshooting continued on the next page.

No	No	No	No
Check external	Switch terminal	Repair terminal	Repair connection.
thermostat wiring and	connections. Red wire	connections. Restart	Restart
thermostat set point.	LO should be	troubleshooting.	troubleshooting.
	connected to ignition
	module W (TH)
	terminal.