Fault Clear Sequence; Normal Sequence Of Operation; Power Up; Heating Mode - Amana xMVM97 series Installation Instructions Manual

LED LED Status
Off
Red
2 Flashes
Communications
LED
Rapid Flashing • Normal network traffic
On Solid
Green
Receive
LED
• When all errors have been displayed, the display
returns to ON.
F C S :
AULT LEAR EQUENCE
• Only allowed in standby mode, while display is
showing ON.
• Hold fault recall push-button for 5-10 seconds (until
display starts flashing "—") and then release.
• All faults in the history will have been cleared, and
display returns to ON.
• If you hold the button for longer than 10 seconds,
the display will return to ON and the faults will not
be cleared.
N S
ORMAL EQUENCE OF
P U
OWER P
The normal power up sequence is as follows:
•
115 VAC power applied to furnace.
•
Integrated control module performs internal checks.
•
Integrated control module monitors safety circuits
continuously.
•
Furnace awaits call from thermostat. Dual 7-segment LED's
display O while awaiting call from thermostat.
H M
EATING ODE
The normal operational sequence in heating mode is as follows:
•
Thermostat contacts close, initiating a call for heat.
•
Integrated control module performs safety circuit checks.
•
Induced draft blower is energized on high speed for a 15-
second prepurge.
•
Induced draft blower steps to low speed following prepurge.
Low stage pressure switch contacts are closed.
Indication
• Normal condition • None
• Out-of-box reset
• Control power up
• Learn button depressed
• Control is "talking" on
network as expected
• Data 1/ Data 2 miss- • Data 1 and data 2 wires reversed
wire at furnace, thermostat or
communicating compatible
outdoor AC/HP
• Short between data 1 and
data 2 wires.
• Short between data 1 or
data 2 wires and R
(24VAC) or C (24VAC
common).
O
PERATION
Possible Causes Corrective Action(s)
• None
• None
• None
• Check communications
wiring (data 1/ data 2
wires).
• Check wire connections at
terminal block
• Check data 1/ data 2
voltages.
•
Igniter warm up begins upon step to low speed and
presence of closed low stage pressure switch contacts.
•
Gas valve opens at end of igniter warm up period, delivering
gas to burners and establishing flame.
•
Integrated control module monitors flame presence. Gas
valve will remain open only if flame is detected.
•
The percentage of heating demand is sent from the
furnace control board to determine what RPM the draft
inducer should run at. A higher percentage demand
will drive the inducer RPM higher. This will cause the
gas valve to modulate higher. The burner will modulate
based on the inducer speed
•
Circulator blower is energized on heat speed following a
thirty (30) second blower on delay. The circulator blower
CFM will increase or decrease with gas valve
modulation. Electronic air cleaner terminal is energized
with circulator blower.
•
Furnace is now operating on the specified stage called for
by the thermostat.
•
Furnace runs, integrated control module monitors safety
circuits continuously.
•
If the two-stage thermostat changes the call from low
heat to high heat, the integrated control module will
immediately switch the induced draft blower, gas valve,
and circulator blower to their high stage settings.
•
The thermostat contacts open, completing the call for
heat.
•
Gas valve closes, extinguishing flame.
•
Induced draft blower is de-energized following a fifteen
second post purge. Humidifier contacts open.
•
Circulator blower continues running for the selected heat
off delay period (90, 120, 150 or 180 seconds). The speed
run during this period depends on the last heat call
provided by the thermostat.
44
Notes & Cautions
• None
• None
• None
• Turn power OFF prior to
repair.
• Verify wires at terminal
blocks are securely twisted
together prior to inserting
into terminal block.
• Verify data 1 and data
voltages as described above