Lennox EL296UHVX Series Unit Information page 37

Code Diagnostic Codes/Status of Equipment
E 406
LSOM - Compressor open start circuit.
E 407
LSOM - Compressor open run circuit.
E 408
LSOM - Compressor contactor is welded.
E 409
LSOM - Compressor low voltage.
DIP Switch Settings
®
NOTE - All icomfort settings are set at the icomfort Wi-Fi
thermostat. See icomfort installation instruction. In icomfort
communication system all DIP switch and clippable link
settings are ignored. For conventional thermostats pro­
ceed with DIP switch and clippable link settings as outlined
in the following.
Heating Operation DIP Switch Settings
Switch 1 -- Thermostat Selection -- This unit may be
used with either a single-stage or two-stage thermostat.
The thermostat selection is made using a DIP switch which
must be properly positioned for the particular application.
The DIP switch is factory-positioned for use with a two-
stage thermostat. If a single-stage thermostat is to be used,
the DIP switch must be repositioned.
Select "OFF" for two-stage heating operation con­
trolled by a two-stage heating thermostat (factory set­
ting);
b - Select "ON" for two-stage heating operation con­
trolled by a single-stage heating thermostat. This set­
ting provides a timed delay before second-stage heat
is initiated.
Switch 2 -- Second Stage Delay (Used with Single-
Stage Thermostat Only) -- This switch is used to deter­
mine the second stage on delay when a single-stage ther­
mostat is being used. The switch is factory-set in the OFF
position, which provides a 7-minute delay before second-
stage heat is initiated. If the switch is toggled to the ON
position, it will provide a 12-minute delay before second-
stage heat is initiated. This switch is only activated when
the thermostat selector jumper is positioned for SINGLE-
stage thermostat use.
Switches 3 and 4 -- Blower-Off Delay -- The blower-on
delay of 30 seconds is not adjustable. The blower-off delay
(time that the blower operates after the heating demand
has been satisfied) can be adjusted by moving switches 3
and 4 on the integrated control. The unit is shipped from the
factory with a blower-off delay of 90 seconds. The blower
TABLE 5 Continued
off delay affects comfort and is adjustable to satisfy individ­
®
ual applications. Adjust the blower off delay to achieve a
supply air temperature between 90° and 110°F at the exact
moment that the blower is de-energized. Longer off delay
settings provide lower supply air temperatures; shorter set­
tings provide higher supply air temperatures.Table 6 pro­
vides the blower off timings that will result from different
switch settings.
Blower Off Delay Switch Settings
Blower Off Delay
(Seconds)
60
90 (Factory)
120
180
Indoor Blower Operation DIP Switch Settings
Switches 5 and 6 -- Cooling Mode Blower Speed -- The
unit is shipped from the factory with the dip switches posi­
tioned for high speed (4) indoor blower motor operation
during the cooling mode. Table 7 provides the cooling
mode blower speeds that will result from different switch
settings. Switches 5 and 6 set the blower cfm for second-
stage cool. The integrated control automatically ramps
down to 70% of the second-stage cfm for first-stage cfm.
Refer to tables for corresponding cfm values.
Speed
Low
Medium Low
Medium High
High (Factory)
Switches 7 and 8 -- Cooling Blower Speed Adjustment
-- The unit is shipped from the factory with the dip switches
positioned for NORMAL (no) adjustment. The dip switches
may be positioned to adjust the blower speed by +10% or
Page 37
Action Required to Clear and Recover
Required amount of current is not passing through
Start current transformer. Clears the error after cur­
rent is sensed in START sensor, or after power re­
set.
Required amount of current is not passing through
Run current transformer. Clears the error after cur­
rent is sensed in RUN sensor, or 1 normal compres­
sor run cycle, or after power reset.
Compressor runs continuously. Clears the error
after 1 normal compressor run cycle or after power
reset.
Secondary voltage is below 18VAC. After 10 min­
utes, operation is discontinued. Clears the code
after voltage is higher than 20 VAC for 2 seconds or
after power reset.
TABLE 6
Switch 3
On
Off
Off
On
TABLE 7
Cooling Mode Blower Speeds
Switch 5
On
Off
On
Off
Switch 4
Off
Off
On
On
Switch 6
On
On
Off
Off