Lennox CBX32MV-018 Configuration Manual

ATTENTION SERVICE PERSONNEL
AIR HANDLER CONTROL SET-UP
PLEASE KEEP WITH UNIT FOR FUTURE USE!
7-SEGMENT DISPLAY AND CONFIGURATION
GUIDE
Refer to unit installation instruction for configuring unit size code
and electric heat.
Unit Size Codes For Air Handlers
Unit Air Handler Unit Air Handler
Size Model Size Model
Code Code
0 CBX32MV-018, 6 CBX40UHV-024
-024
1 7
CBX32MV-024, CBX40UHV-030
-030
2 8
CBX32MV-036 CBX40UHV-036
3 9
CBX32MV-048 CBX40UHV-042
4 L
CBX32MV-060 CBX40UHV-048
5 U
CBX32MV-068 CBX40UHV-060
Code Action
Unit Size Code (number or letter) represents air handler
Power- model size and capacity. Refer to Unit Size Codes For Air
Up Handlers table above. If three horizontal bars are
displayed, AHC does not recognize size and capacity.
Idle mode — decimal blinks at 1 Hertz > 0.5 second ON, 0.5

second OFF. Idle mode is when the system is energized but
no demand.
Cubic feet per minute (CFM) setting for indoor blower - 1
A second ON, 0.5 second OFF > CFM setting for current
mode displayed.
Cooling stage — 1 second ON, 0.5 second OFF > 1 or 2
C displayed > pause > CFM setting displayed > pause >
repeat codes) .
Dehumidification mode — 1 second ON > pause > CFM
d
setting displayed > pause > repeat codes.
d F Defrost Mode
Heat Stage is 1 second ON, 0.5 second OFF > 1 or 2
H displayed > pause > CFM setting displayed > pause >
repeat codes. Electric heat available in 1 to 5 stages.
h Stage heat pump (shows active heat pump stages, h1 or h2)
Discharge air sensor temperature (discharge air sensor
U must be installed, properly configured and indoor blower
must be operating).
Code Action
Indoor Blower Test
Release push button — Control cycles indoor blower on for 10
A seconds at 70% of maximum air for selected capacity size
unit. Control will automatically exit Field Test Mode.
2017 Lennox Industries Inc.
Dallas, Texas, USA
Error Code Recall Mode (Note - control must be in idle mode)
To enter Error Code Recall Mode, push and hold but­
ton until solid E appears, then release button. AHC
E E
will display up to 10 error codes stored in memory. If
E000 is displayed, there are no stored error codes.
To exit Error Code Recall Mode push and hold button
-
until solid three horizontal bars appear, then release
Solid -
button.
-
Note - Error codes are not cleared.
To clear error codes stored in memory, continue to
Unit Air Handler
hold push button while the three horizontal bars are
Size Model
Solid c
displayed. Release push button when solid c is
Code
displayed.
A CBA38MV-018,
Push and hold for one (1) second, release button.
Blink­
-024
c Seven-segment will display 0000 and exit error recall
ing
mode.
C CBA38MV-030
Error Status of Air Handler
The air-handler has lost communication with the rest of the
E CBA38MV-036
system. Check for mis-wired and/or loose connections be­
tween the thermostat, indoor unit and outdoor unit. Check for a
F CBA38MV-042 E105
high voltage source of noise close to the system. This is a self-
recoverable error.
H CBA38MV-048
There is a frequency/distortion problem with the power to the
Y CBA38MV-060
E114
air-handler. Check the voltage and line power frequency
The 24VAC to the air-handler control is lower than the required
E115 range of 18 to 30VAC. Check the voltage and line power fre­
quency.
There is a delay in the air-handler responding to the system.
E120
Check all wiring connections.
The iComfort thermostat has lost communication with the air-
E124 handler for more than 3 minutes. Check the wiring connec­
tions, ohm wires and cycle power.
E130 An air-handler configuration jumper is missing.
The air-handler control parameters are corrupted. Replace
E131
control.
The air-handler control software is corrupted. Replace con­
E132
trol.
The iComfort thermostat has found a problem with the air-
handler outdoor sensor. Compare outdoor sensor resistance
E180
to temperature/resistance charts in unit installation instruc­
tions. Replace sensor pack if necessary.
The system has lost communication with the air-handler in­
E201
door blower motor. Check for loose wiring.
The unit size code for the air-handler and the size of blower
E202
motor do not match. Reconfigure control.
The unit size code for the air-handler has not been selected.
E203
Configure unit size code.
The air-handler's blower motor will not start. Check for seized
E292
bearing, stuck wheel, obstruction etc.
The indoor blower motor is overheating. Check motor bear­
E295
ings and amps. Replace if necessary.
There is a problem with air-handler discharge air sensor.
Compare outdoor sensor resistance to temperature
E310
/resistance charts in installation instructions. Replace sensor
if necessary.
The blower cannot provide the requested CFM due to high
E312
static. Check filter and duct system.
E313 The indoor and outdoor unit capacities do not match.
The O relay on the air-handler has failed. Either the pilot relay
E345
contacts did not close or the relay coil did not energize.
E346 The R to O jumper was not removed on the air-handler control.
The Y1 relay on the air-handler has failed. Either the pilot relay
E347
contacts did not close or the relay coil did not energize.
The Y2 relay on the air-handler has failed. Either the pilot relay
E348
contacts did not close or the relay coil did not energize.
E350 The air-handler's electric heat is not configured.
There is a problem with the air-handler's first-stage electric
E351 heat. Either the pilot relay contacts did not close, or the relay
coil in the electric heat section did not energize.
There is a problem with the air-handler's second-stage elec­
tric heat. Either the pilot relay contacts did not close, or the
E352 relay coil in the electric heat section did not energize. The air-
handler will operate on first-stage electric heat until the issue
is resolved.
There is a problem with the air-handler's third-stage electric
heat. Either the pilot relay contacts did not close, or the relay
E353 coil in the electric heat section did not energize. The air-han­
dler will operate on first-stage electric heat until the issue is re­
solved.
There is a problem with the air-handler's fourth-stage electric
heat. Either the pilot relay contacts did not close, or the relay
E354 coil in the electric heat section did not energize. The air-han­
dler will operate on first-stage electric heat until the issue is re­
solved.
There is a problem with the air-handler's fifth-stage electric
heat. Either the pilot relay contacts did not close, or the relay
coil in the electric heat section did not energize. The air-han­
E355
dler will operate on first -stage electric heat until the issue is
resolved.
The secondary voltage for the air-handler has fallen below
E409 18VAC. If this continues for 10 minutes, the iComfort thermo­
stat will turn off the air-handler.
See unit installation instruction or information manual for details on
clearing the alarms.