Desa GWN20TA 用户手册
www.desatech.com
119344-01B
19
TRoUBlesHooTING
WARNING: Turn off and unplug heater and let cool before servicing.
Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
POSSIBLE CAUSE
1. Ignitor electrode positioned
wrong
2. Ignitor electrode broken
3. Ignitor electrode not con-
3. Ignitor electrode not con-
nected to ignitor cable
4. Ignitor cable pinched or
wet
5. Broken ignitor cable
6. Bad piezo ignitor
6. Bad piezo ignitor
1. Gas supply turned off or
equipment shutoff valve
closed
closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4. Air in gas lines when in-
stalled
5. Depleted gas supply (pro-
pane/LP gas only)
6. ODS/pilot is clogged
7. Gas regulator setting is not
correct
OBSERvED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/
pilot
there is no spark at ODS/
pilot
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
there is spark at ODS/pilot but
no ignition
REMEDY
1. Replace pilot assembly
2. Replace pilot assembly
3. Reconnect ignitor cable
3. Reconnect ignitor cable
4. Free ignitor cable if pinched
by any metal or tubing.
Keep ignitor cable dry
Keep ignitor cable dry
5. Replace ignitor cable
6. Replace piezo ignitor
6. Replace piezo ignitor
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while
in PILOT position
4. Continue holding down
control knob. Repeat ignit-
ing operation until air is
removed
ing operation until air is
removed
5. Contact local propane/LP
gas company
6. Clean ODS/pilot (see Clean-
ing and Maintenance, page
18) or replace ODS/pilot
assembly
18) or replace ODS/pilot
assembly
7. Replace gas regulator