Water Leaks; Climatic Displays - Lennox FCM 85 Installation, Operating And Maintenance Manual

MAINTENANCE DIAGNOSTIC

WATER LEAKS

FAULT
Water found in the ventilation
section
Water ingress in the filter
compartment

CLIMATIC DISPLAYS

FAULT
Nothing is written on the screen
but it's enlightened
Nothing occurs on the unit or an
option disappeared
The message "no link" appears
All the units are extinct
FLEXYII_WSHP-IOM-1307-E
POSSIBLE CAUSE AND SYMPTOMS
Cooling mode:
Water carried away from the coil because
of excessive airflow and speed on the
coil.
Low air pressure in the compartment due
to a high airflow rate or a high pressure
drop before the fan
Check seals around the ventilation
section
Water ingress through a leaking fresh air
hood or when running 100% fresh air
POSSIBLE CAUSE AND SYMPTOMS
Possible problem of display addressing'
Possible problem of units' configuration
Problem of addresses' recognition
Problem main board plan addressing
SOLUTION
Estimate the airflow rate and check
the speed is lower than 2.8 m/s
Check filter
Reduce airflow rate
Check the door seal
Check for the presence of silicone
seals in the corners of the door and at
the bottom of the refrigeration section
bulkhead.
Check the seals and flanges in the
fresh air hood
Reduce the airflow rate if necessary
SOLUTION
Press on the three right-hand side's
buttons at the same time during a few
seconds then reconfigure display
address setting at 32.
Check the instructions from 3811 to
3833 and reconfigure options if
necessary.
Disconnect the DS from the unit and
then reconnect it.
Disconnect then re-plug; disconnect
each unit from the others then change
all the plan addresses
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