26
MAINTENANCE
WARNING
To avoid electrical shock, injury or death, disconnect
electrical power before performing any maintenance. If
you must handler the igniter, handle with care. Touching
the igniter element with bare fingers, rough handling, or
vibration could damage the igniter resulting in premature
failure. Only a qualified servicer should ever handle the
igniter.
Annual inspection
The furnace should be inspected by a qualified installer, or
service agency at least once per year. This check should be
performed at the beginning of the heating season. This will
ensure that all furnace components are in proper working or-
der and that the heating system functions appropriately. Pay
particular attention to the following items. Repair or service
as necessary.
• Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections at
and internal to the furnace.
• Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
•
Burners. Check for proper ignition, burner flame, and
flame sense.
• Wiring. Check that electrical connections are tight and
free from corrosion.
• Filters.
Filters
WARNING
To avoid property damage, personal injury or death,
disconnect electrical power before removing filters. Never
operate furnace without a filter installed because dust
and lint will build up on internal parts resulting in loss of
efficiency, equipment damage and possible fire.
A return air filter is not supplied with this furnace; however,
there must be a means of filtering all of the return air. The
installer will supply filter(s) at the time of installation.
Filter Maintenance
Improper filter maintenance is the most common cause of
inadequate heating or cooling performance. Filters should
be cleaned (permanent) or replaced (disposable) every two
months or as required.
WARNING
HIGH VOLTAGE!
To prevent property damage, personal injury
or death due to electrical shock, disconnect
electrical power to the furnace BEFORE
removing the filter or performing any other
maintenance.
TROUBLESHOOTING
Diagnostic Chart
Refer to the troubleshooting chart in the Appendix for assis-
tance in determining the source of unit operational problems.
The red diagnostic LED blinks to assist in troubleshooting
the unit. The number of blinks refer to a specific code.
Fault Code Retrieval
Fault recall shall be via momentary push button switch when
held depressed for 2–5 seconds while control is in standby
mode. The control shall flash the last five status codes that
have occurred. The control will flash the most recent error
first and the oldest error last (last in first out). There shall be
2 seconds between codes.
Fault Code Reset
The last five fault codes can be erased from memory by de
-
pressing the fault recall switch for 5–10 seconds. At 5 sec-
onds the LED will be rapid flashed (100 mS on, 100 mS off)
to indicate that the switch should be released to erase the
fault codes. Once the switch is released the rapid flash will
stop and the fault codes will be erased. The control shall ac-
knowledge the reset of the fault codes by turning off the LED
for 2 seconds after the switch is released. The LED status
will then return to the normal mode.
Resetting From Lockout
Furnace lockout results when a furnace is unable to achieve
ignition after three attempts. It is characterized by a non-func-
tioning furnace and a one flash diagnostic LED code from the
red LED. If the furnace is in “lockout”, it will (or can be) reset
in any of the following ways.
1. Automatic reset. The integrated control module will
automatically reset itself and attempt to resume normal
operations following a one hour lockout period.
2. Manual power interruption. Interrupt 115 volt power to
the furnace for 1 - 20 seconds.
3. Manual thermostat cycle. Lower the thermostat so that
there is no longer a call for heat for 1 - 20 seconds
then reset to previous setting.
NOTE: If the condition which originally caused the
lockout still exists, the control will return to
lockout. Refer to the Diagnostic Chart for aid in
determining the cause.
