Lennox DM User Manual

DC-DM-ROOFTOP-IOM-1801-E - 43 -
CODE DESCRIPTION CONDITION EFFECT RESET POSSIBLE CAUSES POSSIBLE REMEDIES
DS
MENU
152
Circuit 1, BLDC, Power+.
The status of the inverter
signals a failure on the system.
Waiting stop: 6min,
Enabled: Compressor start.
Stop C1
compressors.
3/day
• Driver failed,
• Problem with wiring of
fieldbus.
• Replace driver,
• Check the bus connections
#
201
EVD N°2, Link Failure.
The driver 2 of EEV is
disconnected from the Fieldbus
network.
Delayed: 30s,
Enabled: 1min after power on.
Stop C1 and/or
C2
compressors.
Automatic
• Driver failed,
• Problem with wiring of
fieldbus.
• Replace driver,
• Check the bus connections
#
202
Circuit 2, Fan Condenser.
The thermal motor protection of
the condenser fan has detected
an over temperature.
Delayed: 5s,
Waiting stop: 30min,
Enabled: 5s after fan start.
Stop C2
compressors.
3/day
• Electric circuit breaker cut,
• Fan motor damaged,
• Thermal motor protection
devices activated,
• Problem with wiring
connection.
• Check, Replace the fan
motor,
• Check the connection.
[2215]
203
Circuit 2, Fan Condenser
Inverter.
Alarm reading by bus on fans
inverter.
Delayed: 15s.
Stop C1
compressors.
Automatic
• Fan motor damaged,
• Thermal motor protection
devices activated.
• Check fans motor. #
210
Circuit 2, Leak Refrigerant,
Detected.
The CLIMATIC has detected a
risk of leakage of the
refrigerant circuit.
… Signalling. Manually • Refrigerant leakage • Check the circuit operating #
214
Circuit 2, Compressor,
Electrical Failure.
An electrical failure happened
in the compressors of the
circuit.
Waiting stop: 30min,
Enabled: 5s after one
compressor start.
Stop C2
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.
[2453]
[2463]
215
Circuit 2, 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 C2
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.
[2444]
216
Circuit 2 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 C2
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
[2442]
and
[2444]

Lennox DM Specifications

General

Brand	Lennox
Model	DM
Category	Monitor
Language	English