Reznor RA 140 Guide de dépannage télécharger pdf (Page 42)

Form I-RA/D 140/235 (Version A), Page 42

Troubleshooting Continued

Check for line

voltage across Terminals

8 and 11. Is voltage

read?

Is ignition

transformer producing

spark?

electrode position

correct?

Check for line

voltage across Terminals

12 and 11. Is voltage

read?

Check oil delivery

system.

Is pressure of

compressed air as

required?

Replace air pressure

switch located in the

main junction box.

Remove air filter and

operate the burner motor.

Check for line

voltage across Terminals

12 and 11. Is voltage

read?

Install new

air filter.

Are there

leaks in the air

connections or

lines?

Replace air tubing

and tighten

connections.

Rebuild

compressor.

Adjust

electrodes.

Are

electrodes and

insulators OK?

Replace ignition

transformer.

Replace electrode

assembly.

Replace ignition

controller.

YES

NO YES

YES NO

YES

Chart No. 3 - Thermostat is calling for heat. Burner motor runs for

about 30-45 seconds. System does not attempt to ignite.

First, check combustion chamber for excess oil.

NOTE: After ignition control is reset, you will have 30 SECONDS

to perform the tests shown below before the controller locks out.

Reset ignition control:

Press the RED BUTTON,

hold for three seconds, and release. DO NOT

RESET MORE THAN ONE TIME.

Transformer and Electrode Checks:

Measure voltage between transformer/primary lead

and neutral connection. Check transformer, insulators,

and electrodes.

The secondary terminals of a good transformer de-

liver 5000 volts arc to ground, for a total of 10,000

volts between terminals. Measure this with a trans-

former tester or use a well insulated screwdriver to

draw an arc across the two springs. This should be at

least 3/4” in length.

Check each secondary output terminal by drawing a

strong arc between the spring and base. If the arc is

erratic, weak, or unbalanced between the two termi-

nals, replace the transformer.

Replace electrodes when the tips become worn or

eroded.

Replace any insulators that are questionable.

Transformer failures and ignition problem can be

caused by the following:

• Excessive gap on the ignition electrodes. Gap

should be 3/32”.

• High ambient temperatures

• High humidity

• Carbon residue on the porcelain bushings

• Low input line voltage

• Arcing between the ignition electrodes and

the transformer springs. They must have good

contact.

• Carbon residue, moisture, crazing or pin holes

on the insulators

• Improper positioning of nozzle in relation to

the radius of the end cone

• Carbon residue on electrode parts

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Reznor RA 140 Guide de dépannage Page 42

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