Goodman GPG 16 M Series, Руководство по установке

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Abnormal Operation - Heating
Internal Control Failure
If the integrated ignition control in this unit encounters an
internal fault, it will go into a “hard” lockout and turn off the
diagnostic LED. If diagnostic LED indicates an internal fault,
check power supply to unit for proper voltage, check all fus-
es, circuit breakers and wiring. Disconnect electric power
for five seconds. If LED remains off after restoring power,
replace control.
External Lockout
An external lockout occurs if the integrated ignition control
determines that a measurable combustion cannot be estab-
lished within three (3) consecutive ignition attempts. If flame
is not established within the seven (7) second trial for igni -
tion, the gas valve is de-energized, 30 second inter-purge
cycle is completed, and ignition is re-attempted. The control
will repeat this routine three times if a measurable combus-
tion is not established. The control will then shut off the in -
duced draft blower and go into a lockout state.
If flame is established but lost, the control will energize the
circulator blower at the heat speed and then begin a new igni-
tion sequence. If flame is established then lost on subsequent
attempts, the control will recycle the ignition sequence.
The diagnostic fault code is 1 flash for a lockout due to failed
ignition attempts. The integrated control will automatically
reset after one hour, or it can be reset by removing the ther-
mostat signal or disconnecting the electrical power supply
for over five seconds. If the diagnostic red LED indicates an
external lockout, perform the following checks:
• Check the supply and manifold pressures
• Check the gas orifices for debris
• Check gas valve for proper operation
• Check flame sensor
A drop in flame signal can be caused by nearly invisible
coating on the sensor. Remove the sensor and careful-
ly clean with steel wool.
• Auxiliary/Secondary Limit
A dirty filter, excessive duct static, insufficient air flow, a
faulty limit, or a failed circulator blower can cause this
limit to open. Check filters, total external duct static,
circulator blower motor, blower motor speed tap (see
wiring diagram), and limit. An interruption in electrical
power during a heating cycle may also cause the aux-
iliary limit to open. The automatic reset secondary limit
is located on top of the circulator blower assembly.
• Rollout Limit
If the burner flames are not properly drawn into the heat
exchanger, the flame rollout protection device will open.
Possible causes are restricted or blocked flue passag -
es, blocked or cracked heat exchanger, a failed induced
draft blower, or insufficient combustion air. The rollout
protection device is a manual reset limit located on the
burner bracket. The cause of the flame rollout must be
determined and corrected before resetting the limit.
• Check wiring
Check wiring for opens/shorts and miswiring.
IMPORTANT NOTE: If you have to frequently reset your
gas/electric package unit, it means that a problem exists that
should be corrected. Contact a qualified servicer for further
information.
Pressure Switch Stuck Open
A pressure switch stuck open can be caused by a faulty
pressure switch, faulty wiring, a disconnected or damaged
hose, a blocked or restricted flue, a blocked pressure tap or
a faulty induced draft blower.
If the control senses an open pressure switch during the pre-
purge cycle, the induced draft blower only will be energized.
If the pressure switch opens after ignition has begun the gas
valve is de-energized, the circulator blower heat off cycle
begins, and the ‘induced draft blower remains on. The diag-
nostic LED (red) code is two (2) flashes.
Pressure Switch Stuck Closed
A stuck closed pressure switch can be caused by a faulty
pressure switch or faulty wiring. If the control encounters a
pressure switch stuck closed, the induced draft blower re-
mains off. The diagnostic red LED code for this fault is three
(3) flashes.
Primary Limit
A primary limit will open due to excessive supply air tem-
peratures. This can be caused by a dirty filter, excessive
duct static, insufficient air flow, or a faulty limit. Check filters,
total external duct static, blower motor, blower motor speed
tap (see wiring diagram), and limit. This limit will automati -
cally reset once the temperature falls below a preset level.
If a limit switch opens, the gas valve is immediately de-en-
ergized, the induced draft and air circulating blowers are en-
ergized. The induced draft and air circulator blowers remain
energized until the limit switch re-closes. The diagnostic
LED (red) code for an open limit is four (4) flashes.
NOTE: If the primary limit opens five (5) times within the
same call for heat, the ignition control will lock out for one
(1) hour with the air circulating blower energized at high heat
speed. The diagnostic LED (red) code for this condition is
seven (7) flashes.
Flame Detected with Gas Valve Closed
If flame is detected with the gas valve de-energized, the com -
bustion and air circulator blowers are energized. The diag-
nostic fault code is five (5) flashes (red LED) for this condition.
The flame diagnostic LED (amber) will flash (2) times to indi -
cate this condition. The control can be reset by removing the
power supply to the unit or it will automatically reset after one
hour. Miswiring is the probable cause for this fault.