Lennox XC17 Series

Page 38
XC17
Air Conditioner
Control LEDs
Solution
Possible
Cause(s)
Condition
icomfort
Toucht
Thermostat
Display
DS11
Green
Solution
Possible
Cause(s)
Condition
icomfort
Toucht
Thermostat
Display
DS14 Red
DS11
Green
Solution
Possible
Cause(s)
Condition
icomfort
Toucht
Thermostat
Display
DS14 Red
SLOW
Flash
ON
Moderate Alert
Code 414
Discharge Line
Temperature
Fault
This code detects high discharge temperatures. If the discharge line
temperature exceeds a temperature of 279ºF (137ºC) during compressor
operation, the air conditioner control will de−energize the compressor contactor
output (and the defrost output if active). The compressor will remain off until the
discharge temperature has dropped below 225ºF (107ºC). See figure 35 for
further details concerning lockouts and reset procedures.
FAST
Flash
ON
Critical Alert
Code 415
Discharge Line
Temperature
Lockout
OFF Fast Flash
Moderate /
Critical Alert
Code 417
Discharge Sensor
Fault
The air conditioner control detects open or short sensor or out of temperature
sensor range. This fault is detected by allowing the unit to run for 90 seconds
before checking sensor resistance. If the sensor resistance is not within range
after 90 seconds, the air conditioner control will raise the alarm.
Fast simultaneous flashing of DS11,
DS13, DS14 and DS15
OEM Mode Factory Test Mode.
1. Pause duration is two (2) seconds.
2. Fast flash duration is 1/2 second. Slow flash duration is one (1) second.
Table 10. Compressor Fault and Lockout LED Codes and Related icomfort Toucht Thermostat Alert Codes
Air Conditioner
Control LEDs
icomfort
Toucht
Thermostat
Display
Condition
Possible
Cause(s)
Solution
Clearing Status
DS15
Yellow
DS13
Red
OFF ON
Moderate/
Critical Alert
Code 400
3
Compressor
Internal
Overload Trip
Thermostat
demand signal
Y1 is present, but
compressor not
running
1
Compressor protector is open.
S Check for high head pressure
S Check compressor supply voltage
2
Outdoor unit power disconnect is open.
3
Compressor circuit breaker or fuse(s) is
open.
4
Broken wire or connector is not making
contact.
5
Low or high pressure switch open if pres-
ent in the system.
6
Compressor contactor has failed to
close.
Clears the error after
current is sensed in the
run and start winding for
two seconds, service
removed or power
reset.