Lennox DM User Manual

DC-DM-ROOFTOP-IOM-1801-E - 42 -
CODE DESCRIPTION CONDITION EFFECT RESET POSSIBLE CAUSES POSSIBLE REMEDIES
DS
MENU
142
Circuit 1, Low Pressure,
Sensor.
The value of the sensor
measured is incorrect.
Delayed: 15s.
Stop C1
compressors.
Automatic
• Sensor failure,
• Problem with wiring of sensor.
• Check the sensor
• Check the wiring connections.
[2412]
143
Circuit 1, Liquid
Temperature, Probe.
The value of the probe
measured is incorrect.
Delayed: 15s.
Stop C1
compressors.
Automatic
• Probe failure,
• Problem with wiring of probe.
• Check the probe
• Check the wiring connections.
[2415]
144
Circuit 1, Suction T°, Probe.
The value of the probe
measured is incorrect.
Delayed: 15s.
Stop C1
compressors.
Automatic
• Probe failure,
• Problem with wiring of probe.
• Check the probe
• Check the wiring connections.
[2614]
145
Circuit 1, Discharge T°,
Probe.
The value of the probe
measured is incorrect.
Delayed: 15s.
Stop C1
compressors.
Automatic
• Probe failure,
• Problem with wiring of probe.
• Check the probe
• Check the wiring connections.
[2426]
148
Circuit 1, BLDC, High
Discharge Temperature.
Over-temperature detected on
the inverter circuit discharge
temperature.
Threshold: > 60°C,
Waiting stop: 6min,
Enabled: Compressor start.
Stop C1
compressors.
3/day
• Limit indoor/outdoor
temperature conditions,
• Refrigerant charge,
• Problem with the expansion
valve.
• Wait normal tempetaure
conditions,
• Check the circuit operating,
• Replace the expansion valve.
[2426]
149
Circuit 1, BLDC, Low
Pressure Difference.
The Δp(|High-Low|) pressure
persists for a period of time
under the limit value.
Thus optimal lubrication is not
guaranteed.
Waiting stop: 6min,
Enabled: Compressor start.
Stop C1
compressors.
3/day
• Limit indoor/outdoor
temperature conditions,
• Refrigerant charge,
• Problem with the expansion
valve.
• Wait normal tempetaure
conditions,
• Check the circuit operating,
• Replace the expansion valve.
[2412]
150
Circuit 1, BLDC, Compressor
Fails to Star.
A specific algorithm checks
whether the compressor
actually started and, if this is
not the case, signals failed
compressor start through an
alarm.
Waiting stop: 6min,
Enabled: Compressor start.
Stop C1
compressors.
3/day
• Limit indoor/outdoor
temperature conditions,
• Refrigerant charge,
• Problem with the expansion
valve.
• Wait normal tempetaure
conditions,
• Check the circuit operating,
• Replace the expansion valve.
#
151
Circuit 1, BLDC, Out of
Envelop.
The suction temperature
calculated by the LP pressure
sensor is outside of the
permitted range.
Waiting stop: 6min,
Enabled: Compressor start.
Stop C1
compressors.
3/day
• Limit indoor/outdoor
temperature conditions,
• Refrigerant charge,
• Problem with the expansion
valve.
• Wait normal tempetaure
conditions,
• Check the circuit operating,
• Replace the expansion valve.
[2412]
and
[2414]

Lennox DM Specifications

General

Brand	Lennox
Model	DM
Category	Monitor
Language	English