Troubleshooting guide – I.C.E. 3 OSDs User Manual

Page 7

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a) This unit depends upon an adequate supply of air for good combustion and operation. Care should be taken to

ensure that properly sized inlet hood and ductwork are installed and that the unit is discharging the right
amount of CFM.


On start up, the unit will not operate properly. It may be an electrical mix up in the wire from the unit to the control
panel (see wiring drawing).

The wire connector shown 12 are in the remote panel.
The wire connector shown

E12 are on the unit.

It is recommended you have a volt meter AC/DC, and a differential pressure gauge 0” - 2”
(magnehelic) and a gas pressure gauge 0” - 12”.


1. If inlet damper fails to open when system switch is pushed in.

a) Check to see if power is on #4. If no power supply starter overloads (1 OLS-1), may be open R1-1

normally closed contacts may be open. Main flame safe guard relay needs to be reset.

2. Fresh air damper open, but no power on #9.

a) Damper end switch open (DMES-1) reset.

3. High exhaust fan operating, no power on #13.

a) Check high exhaust fan inter lock switch.

4. If supply fan is not operating, check delay start timer (TD1) normally set at 3 seconds to allow for exhaust fan

to come up to speed to keep the booth from over pressure and blow the doors open.

a) Balance exhaust and supply fan.

5. No power on #40.

a) Check summer/winter switch.

b) Spray high limit (HL-S).

c) Check air flow across burner with a magnehelic gauge to ensure proper air flow. Should be a difference

between .45” and .65” W.C.

6. Power on #40, but burner will not come on.

a) Change flame safe guard relay.

7. Power on #40 burner tries to fire up but locks out.

a) Check pilot solenoid valve.

b) Check ignition transformer.

c) Check flame rod, if dirty clean, if cracked isolator replace.

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