Lennox DM User Manual

DC-DM-ROOFTOP-IOM-1801-E - 39 -
CODE DESCRIPTION CONDITION EFFECT RESET POSSIBLE CAUSES POSSIBLE REMEDIES
DS
MENU
110
Circuit 1, Leak Refrigerant,
Detected.
The CLIMATIC has detected a
risk of leakage of the
refrigerant circuit.
… Signalling. Manually • Refrigerant leakage • Check the circuit operating #
114
Circuit 1, Compressor,
Electrical Failure.
An electrical failure happened
in the compressors of the
circuit.
Waiting stop: 30min,
Enabled: 5s after one
compressor start.
Stop C1
compressors.
3/day
• Problem with wiring
connection, pressure switch or
compressor internal safety
switch
• Coil condenser dirty,
• Fan condenser not operating.
• Check the wiring connection,
• Clean the coil condenser,
• Check the fan operating.
[2423]
[2433]
115
Circuit 1, Safety High
Pressure, Cut-off.
The condensing pressure read
by the pressure transducer
exceeds the maximum limit.
Threshold: > 42bar/64°C,
Waiting stop: 30min,
Enabled: 5s after one
compressor start.
Stop C1
compressors.
3/day
• Too much Refrigerant charge,
• Problem with wiring
connection, pressure
transducer
• Coil condenser dirty,
• Fan condenser not operating.
• Check the circuit operating,
• Check the wiring connection,
• Clean the coil condenser,
• Check the fan operating.
[2414]
116
Circuit 1 Compressor, Delta
Pressure (HP-LP), Too Low.
The Δp(|High-Low|) pressure is
lower than the safety limit.
Threshold: < 1bar,
Delayed: 5s,
Waiting stop: 1min,
Enabled: 1min after one
compressor start.
Stop C1
compressors.
3/day
• Electric circuit breaker cut,
• Problem with wiring
connection,
• Reversing valve locked
• Check the compressor,
• Check the wiring connection,
• Check the reversing valve
swap
[2412]
and
[2414]
117
Circuit 1, Safety Low
Pressure, Cut-off.
The suction temperature
calculated by the LP pressure
sensor is lower than the
permitted threshold.
Threshold: < -27°C,
Delayed: 2min,
Waiting stop: 30min,
Enabled: 6min after one
compressor start.
Or
Threshold: < -33°C,
Delayed: Immediately,
Enabled: immediately.
Stop C1
compressors.
3/day
or
Manually
• Refrigerant charge • Check the circuit operating [2416]

Lennox DM Specifications

General

Brand	Lennox
Model	DM
Category	Monitor
Language	English