User Guide

Condensing PDV Series
13
Troubleshooting
Observe green LED indicator on
electronic gas control. Error flash codes
are displayed with a three second pause
before repeating. Check and repair the
system as noted in the troubleshooting
table below.
LED Status
Control Status
Probable Cause
Service Procedure
None, control
LED not on or
flashing
No electrical
power.
Control power switch in “OFF” position.
Supply voltage interrupted.
Turn power on.
Short flash once
every four
seconds
Stand-by mode,
waiting for call for
heat (no fault).
Temperature demand is satisfied.
Normal operation.
Adjust thermostat to
temperature level.
“Heartbeat”
alternates
bright/dim
Thermostat
calling for heat
(no fault).
Tank temperature below set point of
thermostat.
Normal operation.
Adjust thermostat to
temperature level.
Short flash once
per second
Weak pilot signal
on last call for
heat.
1. Unstable pilot.
2. Pilot tube blocked or restricted.
3. Oxidation build up on pilot electrode.
4. Wire damage to pilot assembly or bad
connection at gas valve.
5. Low gas pressure.
Page 17
Procedure II
Two flash, three
second pause
Pressure switch
not working –
closed position.
1. Pressure switch tubing kinked or blocked.
2. Blocked pressure tap on switch or blower.
3. Faulty pressure switch.
Page 18
Procedure III
Three flash,
three second
pause
Pressure switch
or blower temp.
switch not
working – open
position.
1. Vent blockage or improper vent
configuration.
2. Pressure switch tubing kinked or blocked.
3. Faulty pressure switch.
4. Blower not spinning up to speed.
5. Blower temp or exhaust temp too high.
6. Faulty blower temperature switch.
1. Check vent or vent
tables.
2. & 3. Page 18
4. Page 20
5. & 6. Page 22
Four flash, three
second pause
Excessive tank
temperature.
System must be
reset.
1. Temperature sensor out of calibration.
2. Faulty gas control.
3. Plumbing leak.
1. Page 22
2. Replace gas
control, page 26
Five flash, three
second pause
Undesired-false
pilot flame
present.
1. Pilot valve stuck in open position.
Replace gas control,
page 26
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