Desa CB36N, CB36P operation manual Observed Problem Possible Cause Remedy

Models: CB36P CB36N

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Troubleshooting

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

Electronic Ignition Models

1. No gas supply, or shutoff

1.

Check to see if you have gas

Only Ignitor will not spark or

 

valve is OFF

 

supply and that equipment

pilot will not light

 

 

 

shutoff valve is opened

 

2.

Air in gas line

2.

Repeat lighting procedure

 

 

 

 

several times to purge all air

 

 

 

 

out of lines. If after repeated

 

 

 

 

attempts appliance does

 

 

 

 

not light, call for qualified

 

 

 

 

service and repair

 

3.

Construction debris clog-

3.

Remove debris and dirt, and

 

 

ging pilot orifice

 

inspect and clean any other

 

 

 

 

possible obstructions

 

4.

Low gas pressure

4.

Contact your gas supplier

 

 

 

 

to check pressure

 

5.

Kinked pilot line

5.

Have a qualified technician

 

 

 

 

replace pilot line

 

6.

Control valve is not open-

6.

Replace control valve (Re-

 

 

ing

 

fer to Replacement Parts,

 

 

 

 

page 31)

 

7.

No power to unit or the

7.

Check that main power is

 

 

ignition module

 

on and that wire connec-

 

 

 

 

tions are made correctly

 

 

 

 

to the ignition model (see

 

 

 

 

Wiring Diagrams, page 13).

Check for 24 VAC at the secondary side of the trans- former. If 24 VAC is present, and the module does not operate, have the module replaced otherwise have the transformer replaced

Electronic Ignition Models 1.

Loose wiring on ignitor wire

Only Pilot will not stay lit

to ignition module and/

 

or poor ground to ignition

 

module

2.

Pilot flame too low to

 

sense

1.Check wiring connection. Refer to wiring diagram (see Wiring Diagrams, page 13) and/or check ground wire to ignition module

2.Clean and adjust pilot burner and check gas supply and inlet pressure to unit. Note:

Have a qualified technician replace pilot assembly if broken or corroded

Electronic Ignition Models

1.

Pilot flame may be too low

1.

Clean and adjust pilot flame

Only Frequent outage of main

 

to sense flame causing

 

for maximum flame across

burner and pilot after complete

 

ignition module to shut

 

sensor rod

ignition sequence

 

down

 

 

 

2.

Improper or restricted

2.

Locate and correct all vent

 

 

venting

 

conditions (see Checking for

 

 

 

 

Proper Venting, page 10)

117437-01D

www.desatech.com

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Desa CB36N, CB36P operation manual Observed Problem Possible Cause Remedy