Table 24: Functional Alerts — DPS 003–015 only
Display Information
Alert
Description
Possible Cause
Solution
AO1
Failed ignition attempt
Maximum number of
allowed retries not met
The flame could not be
established during the
trial for ignition period.
This alert indicates the
maximum number of
retries has not been
exceeded and furnace
operation will continue with
another ignition attempt.
See “
01
” in the
LOCKOUT ERRORS
section.
See “
01
” in the
LOCKOUT ERRORS
section.
AO2
Lost Flame
The flame sensor signal
has been lost after flame
is established during a
call for heating. This alert
is displayed during the
ignition RECYCLE period
prior to the next ignition
attempt .
A. Flame sensor coated
1. Clean flame rod sensor.
B . Flame sensor
improperly mounted or
grounded
1. Check flame sensor
wiring integrity and
ceramic for cracks.
2. Re-install / replace
flame sensor.
C. Unstable flame pattern
1. Check that all burner
assembly components
are properly installed.
2. Check that all seals
between the vestibule
area and the heat
exchanger area are
tight.
3. Insure that the
combustion door
gasket is in place and
the door is properly
installed .
D. Insufficient intermediate
gas manifold pressure
through main gas
safety valve
1. Check for faulty gas
valve wiring.
2. Check 24 VAC to gas
valve assembly.
3. Check inlet pressure to
safety gas valve.
4. Check outlet pressure
from the safety gas
valve.
5. Replace safety gas
valve if faulty.
E. Insufficient gas manifold
pressure to burner
through modulating ball
valve assembly
1. Check voltage to gas
valve actuator. (2 – 10
VDC depending on
model)
2. Check alignment and
set screw connection
between ball valve and
actuator.
AO3
Insufficient Combustion Air
Furnace Functional
Furnace cannot achieve
desired combustion air
flow due to blockage or
high altitude operation
resulting in a de-rate of the
furnace.
A. High altitude operation
1 . Normal operation .
Furnace automatically
de-rates for high
altitude conditions
B. Partially blocked vent
1. Check air inlet and
outlet for blockage.
2. Check venting
configuration for
excessive venting
length, improper sizing,
etc..
C. Leak in sensing hose
1. Check sensing hose for
cracks, crimps or loose
connections.
D. Low Line Voltage
1. Check sensing hose for
cracks, crimps or loose
connections.
E. Faulty inducer assembly
1. Insure correct inducer
assembly installed and
functioning properly.
o
pTIonal
g
as
h
eaT
www.DaikinApplied.com
55
IM 1125-7 • REBEL ROOFTOPS
Содержание Rebel DPS003A
Страница 109: ...IM 1125 7 109 Addendum follows...