Lennox Signature XC17, Руководство по установке

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Page 36
506510−01
Outdoor Main Control
LEDs
Solution Possible Cause(s) Condition
DS11
Green
Solution Possible Cause(s) Condition
DS14 Red
DS11
Green
Solution Possible Cause(s) Condition
DS14 Red
OFF
1 Fast
Flash then
Pause
Heating Low
Capacity
These are codes that show status of operation whether in low stage or high stage, heating or cooling,
defrost or in the EDA mode.
OFF
2 Fast
Flash then
Pause
Heating High
Capacity
ON
2 Fast
Flash then
Pause
Defrost
1 Fast
Flash then
Pause
OFF
Cooling Low
Capacity
2 Fast
Flash then
Pause
OFF
Cooling High
Capacity
2 Fast
Flash then
Pause
ON
Dehumidification
Mode
ALERT STATUS
OFF
SLOW
Flash
Low Pressure
Fault
1
Restricted air flow over
indoor or outdoor coil.
2
Improper refrigerant
charge in system.
3
Improper metering de-
vice installed or incorrect
operation of metering de-
vice.
4
Incorrect or improper
sensor location or con-
nection to system.
1
Remove any blockages or restrictions from coils and/or fans. Check
indoor and outdoor fan motor for proper current draws.
2
Check system charge using approach and subcooling temperatures.
3
Check system operating pressures and compare to unit charging
charts.
4
Make sure all pressure switches and sensors have secure connec-
tions to system to prevent refrigerant leaks or errors in pressure and
temperature measurements.
OFF ON
Low Pressure
Switch Lockout
SLOW
Flash
OFF
High Pressure
Fault
ON OFF
High Pressure
Discharge Sensor
Lockout
SLOW
Flash
ON
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 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 21 for further details concerning lockouts and reset
procedures.
FAST
Flash
ON
Discharge Line
Temperature
Lockout
OFF Fast Flash
Discharge Sensor
Fault
The 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 control will raise the alarm.
Fast simultaneous
flashing of DS11, DS13,
DS14 and DS15
OEM Mode Factory Test Mode.
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