IX. TROUBLE SHOOTING. Applied Air GAS-FIRED HEATERS

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IX. TROUBLE SHOOTING. Applied Air GAS-FIRED HEATERS | Manualzz

IX. TROUBLE SHOOTING CHART

Blower runs but there is no heat

Is S/W switch or

Outside Air

Override closed?

Yes

Is there Power to switch?

Yes

Is 5 Amp

Breaker Tripped?

No

No

Yes

No

Is there power at terminal #1?

Yes

Is Air Flow

Switch Closed?

Yes

Refer to Fireye

Guide

No

No

Select Heat on S/W switch or adjust temp on OSAOR

Check Building

Breaker

Reset

Check Wiring

Adjust or Replace

Burner lights but heater stays in

Low Fire

Is there voltage on Terminal #5 on Flame Safety

Control

Yes

Does transformer have 24V output?

No

No

Yes

With wires 3 & 4 removed from the

Maxitrol Amplifier, is there 9.5K - 11K ohms between the wires?

No

Yes

Remove Terminal #4 from the

Maxitrol Amplifier. Does the heater go into High Fire?

No

Yes

No

Replace

Amplifier

Replace

FSC

Replace

Replace

Discharge Air

Sensor

Is there a short or open circuit in Modulating

Valve? Should be

45-55 ohms

Yes

Replace

Modulating Valve

With wires 1 & 2 removed from the

Maxitrol Amplifier, is there 9.5K - 11K ohms between the wires?

No

Replace

Temperature

Selector

12

Burner lights but heater stays in High Fire

Is there a jumper between terminals 2 & 3 on the

Maxitrol Amplifier?

No

Yes

Is there a short circuit in the

Remote Temperature

Selector or wiring?

Yes

No

Is there an open circuit in the Discharge Air Sensor or wiring?

Yes

No

Is Plunger in the Modulating

Valve jammed? Inspect and clean. It should operate freely in the sleeve.

No

Foreign object holding valve open. Remove bottom plate and inspect valve and seat. Clean or replace valve.

Install

Jumper

Repair short or replace

Temperature Selector

Repair circuit or replace the

Discharge Air

Sensor

Nothing Happens

Is Fire System

Installed & Armed?

No

Activate

Is Overload tripped on starter?

Yes Reset & measure FLA on motor. Is it higher than rating?

Yes

No

Is Freeze-Stat open?

Yes

No

Is limit switch on

Motorized Damper closed?

No

Adjust or Replace

Adjust or Replace

Adjust or change

Pulley

13

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