System Status, Fault And Lockout Led Codes - Lennox XP17-024-230-01 Installation And Service Procedure

System Status, Fault and Lockout LED
Codes
LED codes are displayed using various LEDs located on
the heat pump control (A175). See figure 3 for locations of
heat pump control LEDs.
DS11 AND DS14 — SYSTEM STATUS, FAULT AND
LOCKOUT LED CODES
DS11 (Green) and
non-communicating mode diagnostics conditions that are
listed in table 5.
These LEDs display fault conditions in unit cooling and
heating capacity, dehumidification mode, anti-short cycle
lockout, high and low pressures, discharge line
temperature, outdoor temperature, and discharge sensor
failures.
DS15 AND DS13 — COMPRESSOR FAULT AND
LOCKOUT LED CODES
DS15 (Yellow) and DS13 (Red) LEDs indicate diagnostics
conditions that are listed in table 6.
These LEDs display the most common compressor or
compressor related fault conditions in the unit. When an
abnormal condition
communicates the specific condition through LEDs. The
diagnostic function is capable of detecting both mechanical
and electrical system abnormal conditions.
Table 5. System Status, Fault and Lockout LED Codes and Related iComfortt-Enabled Thermostat Alert Codes
System fault and lockout LED (DS11 / DS14) alarm codes takes precedence over system status LED codes (cooling, heating stages or
defrost/dehumidification). Only the latest active LED fault or lockout alarm code if present will be displayed. If no fault or lockout codes are active, then
system status LEDs are routinely displayed. See notes 1 and 2 in table below for duration of fast / slow flashes and pause.
Heat Pump Control
iComfortt
LEDs
-enabled
Thermostat
DS11
DS14 Red
Display
Green
Off Off
applicable
Simultaneous slow flash
applicable
Alternating slow flash
applicable
Moderate /
Simultaneous fast
Critical Alert
flashes
Code 180
Moderate /
Critical Alert
Alternating fast flash
Code 417
On On
applicable
XP17
DS14 (Red) LEDs indicate
is detected, this function
Condition
Not
Power problem
Not
Normal operation
5-minute
Not
anti-short cycle
delay
Ambient sensor
problem
Coil sensor
problem
Not Heat pump
control failure
IMPORTANT
DS15 and DS13 compressor LED fault and lockout
codes do not provide safety protection. The is a
monitoring function only and cannot control or shut down
other devices.
RESETTING FAULT AND LOCKOUT LED CODES
All LED fault and lockout codes can be reset manually or
automatically:
1. Manual Reset
Manual reset can be achieve by one of the following
methods:
S
Disconnecting R wire from the heat pump's R
terminal.
S
Turning the indoor unit off an on again
After power up, existing code will display for 60
seconds and then clear.
2. Automatic Reset
After a fault or lockout is detected, the heat pump
control continues to monitor the unit's system and
compressor operations. When/if conditions return to
normal, the alert code is turned off automatically.
Possible Cause(s)
SYSTEM STATUS
1. No power (24V) to
heat pump control
terminal's R and C or 1
heat pump control
2
failure.
2. Heat pump control
failure.
Unit operating normally or in standby mode.
Initial power up, safety trip,
None required (Jumper FIELD TEST (E33) pins to
end of room thermostat de­
override)
mand.
If sensor detects an open, shorted or out-of-temperature range. heat pump control
will revert to time/temperature defrost operation. System will still heat or cool.
If the outdoor coil temperature sensor is detected as being open or shorted, the
heat pump control will not perform defrost operations.
Indicates that heat pump control has an internal component failure. Cycle 24 volt
power to heat pump control. If code does not clear, replace the heat pump control.
Page 14
Solution
Check control transformer power (24V).
If power is available to control and LED(s) do not
light, replace the heat pump control.