Configuring Unit Size Codes - Lennox SIGNATURE SLP99UHV Installation Instructions Manual

Integrated Control Diagnostic Codes
Code Diagnostic Codes/Status of Equipment
E402 LSOM - Outdoor unit system pressure trip.
LSOM - Compressor short-cycling (Running less than
E403
4 minutes).
E404 LSOM - Compressor rotor locked.
E405 LSOM - Compressor open circuit.
LSOM - Compressor open start circuit.
E406
E407 LSOM - Compressor open run circuit.
LSOM - Compressor contactor is welded.
E408
E409 LSOM - Compressor contactor is welded.

Configuring Unit Size Codes

To enter Field Test
Mode: push and hold
button
7-segment LED display
until solid dash symbol
appears.
button.
Push and hold button until the solid P
symbol is displayed on the 7-segment
LED. Release button. This mode allows
the user to select a unit size code number
that matches the furnace model size and
capacity.
IMPORTANT: Field replacement controls may
need to be manually configured to validate
furnace unit size code.
Push and hold button. Integrated control will
display unit size code number for each
furnace model for five seconds.
Power-Up - Number displayed represents by integrated control unit size code (furnace model
and capacity). If three horizontal bars are displayed followed by continuous E203, furnace
control does not recognize unit size code. Configure per the following:
Yes
next to
_
Release
If alarm is present, furnace
_
control will display error
code. If alarm is not
present solid dash starts
blinking on 7-segment
LED display.
P
Solid starts
P
blinking on
7-Segment LED
Action Required to Clear and Recover
Compressor ran over 18 hours in air conditioning mode.
Outdoor unit pressure trip. Check dirty coil, fan motor,
refrigerant charge.
Compressor short cycling (Running less than 4 minutes).
Check capacitor, wiring, hard start kit , replace
Compressor.
Check compressor for hot (cool down) , check pressures,
fan motor etc. Replace compressor if unable to get circuit
to close and compressor to operate.
Replace contactor.
Furnace control in IDLE mode
No heating, cooling or indoor fan
operation)
P
When the correct unit size code is displayed, release
button. Selected code will flash for 10-second period.
During that period, hold push button until code stops
blinking (disappear for 2 seconds). Integrated control
will store code in memory and will automatically exit
Field Test Mode and reset. (If second period expires
or push button is held less than five seconds, control
will automatically exit Field Test Mode and go into
IDLE mode without storing unit size code. If this
happens, programming function must be repeated).
Verify that the selected unit size code is correct
and stored in non-volatile memory by cycling
the 24 volt power to the furnace control. (At 24
volt power-up of the furnace control, the
7-segment LED will display a unit size code. If
three horizontal bars display, board does not
recognize unit size code. Programming
function must be repeated)
Page 62
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No
Turn room thermostat to OFF
UNIT SIZE
CODE
FURNACE MODEL
A
SLP99UHXV-070-36B
b
SLP99UHXV-090-36C
C
SLP99UHXV-090-48C
d
SLP99UHXV-090-60C
E
SLP99UHXV-110-60C
F
SLP99UHXV-135-60D
FINISHED
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