Lennox DM User Manual

DC-DM-ROOFTOP-IOM-1801-E - 31 -
ALARM LIST
CODE DESCRIPTION CONDITION EFFECT RESET POSSIBLE CAUSES POSSIBLE REMEDIES
DS
MENU
001
Blower, Flow Switch, Cut-off.
The differential pressure
between the treatment unit and
the filters is too small.
Delayed: 1min,
Waiting stop: 1min,
Enabled: 3min after Blower
start.
Full stop. 3/day
• Air system obstructed or
closed,
• Belts broken,
• Problem with the fan wiring,
• Problem with the pressure
transmitter wiring,
• Incorrect settings of the safety
threshold.
• Check the system,
• Replace the belts,
• Check the connections,
• Check the settings (2333 or
3343).
[2332]
[3342]
002
Water Condenser, Flow
Switch Cut Off.
The flow switch has detected a
low water flow rate in the
condenser heat exchanger.
Delayed: 5s,
Waiting stop: 1min,
Enabled: 5s after one
compressor start.
Stop all
compressors.
3/day
• Problem with the pump
control wiring,
• Problem with the flow switch
wiring,
• Dirty or clogged water filter,
• Wrong setting of the flow
switch.
• Check the pump connections,
• Check the flow switch
connections,
• Clean the water filter,
• Check the flow switch
settings.
[2533]
003
Water Condenser, Flow
Delta-T.
The ΔT(|inlet-outlet|) of the
condenser heat exchanger has
too low or too high, detect a
low water flow rate.
Threshold: < 1K, > 40K,
Delayed: 10min,
Waiting stop: 2min,
Enabled: 10min after one
compressor start.
Stop all
compressors.
3/day
• Problem with the pump
control wiring,
• Dirty or clogged water filter.
• Check the pump connections,
• Clean the water filter.
[2531]
and
[2532]
004
Blower, Filters, Clogged.
The differential pressure
between the treatment unit and
the filters is too high.
Threshold: > [2335][3345],
Delayed: 10min,
Enabled: 10min after Blower
start.
Signalling. Automatic
• Filters clogged,
• Problem with the pressure
transmitter wiring,
• Incorrect settings of the safety
threshold.
• Fit new filters,
• Clean or replace the filters,
• Check the connections,
• Check the settings (2335 or
3345).
[2332]
[3342]
004
Blower, Filters, Clogged.
Clogged or Missing Filters
Alarm keeps active during 168
hours (7 days non stop).
Delayed: 168h. Full stop. Manually
• Filters clogged,
• Problem with the pressure
transmitter wiring,
• Incorrect settings of the safety
threshold.
• Fit new filters,
• Clean or replace the filters,
• Check the connections,
• Check the settings (2335 or
3345).
[2332]
[3342]
005
Blower, Filters, Missing.
The differential pressure
between the treatment unit and
the filters is too low.
Threshold: > [2334][3344],
Delayed: 10min,
Enabled: 10min after Blower
start.
Signalling. Automatic
• Filters missing,
• Problem with the pressure
transmitter wiring,
• Incorrect settings of the safety
threshold.
• Fit new filters,
• Clean or replace the filters,
• Check the connections,
• Check the settings (2334 or
3344).
[2332]
[3342]

Lennox DM Specifications

General

Brand	Lennox
Model	DM
Category	Monitor
Language	English