Lennox CBX32MV-036 User manual

2017 Lennox Industries Inc.
Dallas, Texas, USA
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
Size
Code
Air Handler
Model
Unit
Size
Code
Air Handler
Model
Unit
Size
Code
Air Handler
Model
0CBX32MV-018,
-024
6CBX40UHV-024 ACBA38MV-018,
-024
1CBX32MV-024,
-030
7CBX40UHV-030 CCBA38MV-030
2CBX32MV-036 8CBX40UHV-036 ECBA38MV-036
3CBX32MV-048 9CBX40UHV-042 FCBA38MV-042
4CBX32MV-060 LCBX40UHV-048 HCBA38MV-048
5CBX32MV-068 UCBX40UHV-060 YCBA38MV-060
Code Action
Power-
Up
Unit Size Code (number or letter) represents air handler
model size and capacity. Refer to Unit Size Codes For Air
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.
A
Cubic feet per minute (CFM) setting for indoor blower - 1
second ON, 0.5 second OFF > CFM setting for current
mode displayed.
C
Cooling stage — 1 second ON, 0.5 second OFF > 1 or 2
displayed > pause > CFM setting displayed > pause >
repeat codes) .
dDehumidification mode — 1 second ON > pause > CFM
setting displayed > pause > repeat codes.
d F Defrost Mode
H
Heat Stage is 1 second ON, 0.5 second OFF > 1 or 2
displayed > pause > CFM setting displayed > pause >
repeat codes. Electric heat available in 1 to 5 stages.
hStage heat pump (shows active heat pump stages, h1 or h2)
U
Discharge air sensor temperature (discharge air sensor
must be installed, properly configured and indoor blower
must be operating).
Code Action
Indoor Blower Test
A
Release push button — Control cycles indoor blower on for 10
seconds at 70% of maximum air for selected capacity size
unit. Control will automatically exit Field Test Mode.
Error Code Recall Mode (Note - control must be in idle mode)
E E
To enter Error Code Recall Mode, push and hold but
ton until solid E appears, then release button. AHC
will display up to 10 error codes stored in memory. If
E000 is displayed, there are no stored error codes.
Solid
-
-
-
To exit Error Code Recall Mode push and hold button
until solid three horizontal bars appear, then release
button.
Note - Error codes are not cleared.
Solid c
To clear error codes stored in memory, continue to
hold push button while the three horizontal bars are
displayed. Release push button when solid cis
displayed.
Blink
ing c
Push and hold for one (1) second, release button.
Seven-segment will display 0000 and exit error recall
mode.
Error Status of Air Handler
E105
The air-handler has lost communication with the rest of the
system. Check for mis-wired and/or loose connections be
tween the thermostat, indoor unit and outdoor unit. Check for a
high voltage source of noise close to the system. This is a self-
recoverable error.
E114 There is a frequency/distortion problem with the power to the
air-handler. Check the voltage and line power frequency
E115
The 24VAC to the air-handler control is lower than the required
range of 18 to 30VAC. Check the voltage and line power fre
quency.
E120 There is a delay in the air-handler responding to the system.
Check all wiring connections.
E124
The iComfort thermostat has lost communication with the air-
handler for more than 3 minutes. Check the wiring connec
tions, ohm wires and cycle power.
E130 An air-handler configuration jumper is missing.
E131 The air-handler control parameters are corrupted. Replace
control.
E132 The air-handler control software is corrupted. Replace con
trol.
E180
The iComfort thermostat has found a problem with the air-
handler outdoor sensor. Compare outdoor sensor resistance
to temperature/resistance charts in unit installation instruc
tions. Replace sensor pack if necessary.
E201 The system has lost communication with the air-handler in
door blower motor. Check for loose wiring.
E202 The unit size code for the air-handler and the size of blower
motor do not match. Reconfigure control.
E203 The unit size code for the air-handler has not been selected.
Configure unit size code.
E292 The air-handler's blower motor will not start. Check for seized
bearing, stuck wheel, obstruction etc.
E295 The indoor blower motor is overheating. Check motor bear
ings and amps. Replace if necessary.
E310
There is a problem with air-handler discharge air sensor.
Compare outdoor sensor resistance to temperature
/resistance charts in installation instructions. Replace sensor
if necessary.
E312 The blower cannot provide the requested CFM due to high
static. Check filter and duct system.
E313 The indoor and outdoor unit capacities do not match.
E345 The Orelay on the air-handler has failed. Either the pilot relay
contacts did not close or the relay coil did not energize.
E346 TheRto Ojumper was not removed on the air-handler control.
E347 The Y1 relay on the air-handler has failed. Either the pilot relay
contacts did not close or the relay coil did not energize.
E348 The Y2 relay on the air-handler has failed. Either the pilot relay
contacts did not close or the relay coil did not energize.
E350 The air-handler's electric heat is not configured.
E351
There is a problem with the air-handler's first-stage electric
heat. Either the pilot relay contacts did not close, or the relay
coil in the electric heat section did not energize.
E352
There is a problem with the air-handler's second-stage elec
tric heat. Either the pilot relay contacts did not close, or the
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.
E353
There is a problem with the air-handler's third-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
dler will operate on first-stage electric heat until the issue is re
solved.
E354
There is a problem with the air-handler's fourth-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
dler will operate on first-stage electric heat until the issue is re
solved.
E355
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
dler will operate on first -stage electric heat until the issue is
resolved.
E409
The secondary voltage for the air-handler has fallen below
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.

OUTDOOR
AIR SENSOR
HEAT
1234
COOL
1234
DELAY
1234
ADJUST
NORM + -
HUMIDIFICATION
SMART AUTO
EVENHEAT
1234
BLOWER
ONLY CFM
100
115
130
85
Y1-Y2
2-STAGE
COMPR
R-O
HEAT
PUMP
R-DS
DEHUM
OR
C
W1 W2
G
Y2 Y1
C R
DH
H
L
O
DS
W3
FACTORY
JUMPER
FUSE 3 AMP
XFMR 24V
24 VAC
COM
3 6 9
1
4
7
XFMR LINE
G
7-SEGMENT LED
DEHUMIDIFICATION-
HARMONY LINK
(JUMPERS R to DS)
HEAT PUMP LINK
(JUMPERS R to O)
2-STAGE
COMPRESSOR LINK
(JUMPERS Y1 to Y2)
ON-BOARD LINK
OPTION SELECTION
1
JUMPER & LINK GUIDE
-CUT ON-BOARD LINK (SOLDER TRACE) COMPLETELY
THROUGH BOTH LAYERS ON THE CONTROL BOARD
1
COOLING BLOWER RAMPING
DELAYPROFILE #3
OFF-82%-100%-OFF
CLG
HP
DELAYPROFILE #2
DELAYPROFILE #1
OFF-100%-OFF
DELAYPROFILE #4
OFF-50%-82%-
100%-50%-OFF
*
(COOLING MODE UNLESS NOTED)
1234
1234
1234
1234
*
HUMIDIFICATION MODE
SMART MODE
- ”H” ENABLED WHEN
HEAT ACTIVE
(HP or ELECT. HT)
AUTO MODE
- ”H” ENABLED WHEN
BLOWER ACTIVE
& NO CLG
OR DEHUM
HUMIDIFICATION MODE 24VAC OUTPUT ON ”H”
FOR HUMIDIFIER OR
ACCESSORY INTERLOCK
SMART AUTO
SMARTAUTO
FACTORY DEFAULT SETTING
*
COOLING MODE
BLOWER SPEED
HIGH
SPEED
MEDIUM-LOW
SPEED
LOW
SPEED
1234
MEDIUM-HIGH
SPEED
*
1234
1234
1234
(COOLING & HP MODE)
STANDARD
HEAT MODE
(STAGED BY TSTAT)
STANDARD HEAT MODE
(DEFAULT)
85
110
115
130
HEATING MODE
BLOWER SPEED
*
(ELECTRIC HT MODE)
1234
1234
1234 1234
LOW
SPEED
MEDIUM-LOW
SPEED
MEDIUM-HIGH
SPEED
HIGH
SPEED
NORM +-
NORM+-
NORM+ -
BLOWER
ADJUST SELECTION
NORMAL
(+ 10%)
SETTING
(-10%)
SETTING
*
*
EVENHEATERMODE
85
DEGREE TARGET
DISCHARGE
TEMPERATURE
100
DEGREE
TARGET
115
DEGREE
TARGET
130
DEGREE
TARGET
85
110
115
130
-ENABLED WITH OPTIONAL
DISCHARGE AIR SENSOR
85
110
115
130
85
110
115
130
85
110
115
130
PUSH
BUTTON
HIGH
SPEED
(100%)
MEDIUM-HIGH
SPEED
(70%)
LOW
SPEED
(28%)
* MEDIUM-LOW
SPEED
(38%)
1234
1234 1234 1234
CONTINUOUS FAN
BLOWER SPEED
IMPORTANT: USE CARE WHEN CUTTING LINKS TO
PREVENT DAMAGE TO CONTROL.
2 5 8
P8
L1
L2
L2 L1 INDOOR
BLOWER POWER
EARTH
INDOOR BLOWER SIGNAL
456
12 3
OUTDOOR UNIT
LINK
I + I -
I + I -RC
I + I -RC
THERMOSTAT
HUMIDITROL
DH
DISCHARGE
AIR SENSOR
HARMONY
R-DS
DEHUM
or
NO HARMONY ZONING
OR NO
COMFORTSENSE 7000
W/ DS CONNECTION
DO NOT CUT
HARMONY ZONING
OR
C0MFORTSENSE 7000
W/ DS CONNECTION
CUT LINK
HARMONY
R-DS
DEHUM
or
HARMONY
1
A/C UNIT HEAT PUMP UNIT
R-0
HEAT
PUMP
R-0
HEAT
PUMP
1
DO NOT CUT CUT LINK
2 STAGE
COMPR
1-STG COMPRESSOR 2-STG COMPRESSOR
Y1-Y2
1
DO NOT CUT CUT LINK
*
*
*
2 STAGE
COMPR
Y1-Y2
OFF  100%  DEMAND SATISFIED  100% FOR 45 SECONDS  OFF
OFF  30 SECOND DELAY  100%  DEMAND SATISFIED  100% FOR 45 SECOND  OFF