Raypak 302B, 902B manual Troubleshooting, Step Step Step Step Step

TROUBLESHOOTING

Step 1

Step 2

Step 3

Step 4

Step 5

Does the power switch

provide power to the

Check the switch

control panel?

NO

and/or line voltage

Replace ignition module

Is there a Call For

YES

Heat?

Unit is in standby mode.

Check all safety limit

NO

YES

devices and voltage from

Reattach.

the transformer to J10 on

Is Disable jumper intact? (J1)

CPW board.

NO

NO

Is there 120VAC at J8

NO

YES

Connector on the CPW board?

Does F2 on

ignition module

NO

have 120VAC?

Do the combustion air

YES

YES

blowers come on?

Is 24VAC at present at TH (J3 & J12 on CPW

YES

NO

YES

board and orange wire on ignition module)?

Check flow switch, all

Are the blower lights

NO

Is air pressure switch(s) and

connectors on CPW board

illuminated?

and controller.

J2 of CPW board (N.O.)

powered?

Check the fan relay. Is there

120VAC at K3 relay?

YES

YES

YES

NO

Is there continuity from the

NO

Is 24VAC at PS on

fan relay to fan(s)?

YES

ignition module? Is

Does air pressure switch(s)

Replace fan relay

connecting plug

have correct pressure?

secure?

(1

.4” W.C.)

Replace fan

YES

Does igniter prove?

Replace air

NO

pressure switch

NO

Step 6

Step 7

YES

		Check Amp draw during
		heat-up for greater than
			3.1 Amps.
Is the flame
				NO
sensor signal to
the ignition
module greater
than 1 uA DC?			NO
	YES

Is the unit running?

NOYES

Call our Technical Service Department

1-805-278-5300

							Correct the air settings or
			Is air switch				you may have to clean
	YES
							burners, heat exchanger
			bouncing?
							and/or air filter.
Replace HSI		NO
					YES
Are the gas valve						Readjust to 3.5” W.C.
				NO			gas.
settings correct?
							Is the unit running?

	YES
					NO
Is static and dynamic inlet
manifold gas pressure correct?				Replace gas valve
			YES
Is downdraft present?
		NO
The unit is okay			Clean or replace flame sensor

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