Lennox BAC 024 SNM 3M, Инструкция по установке, эксплуатации и обслуживанию

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BALTIC-IOM-0412-E / Service manual
SERVICE DIAGNOSTIC
Electric heater
Water leaks
CLIMATIC™ Displays
Fault Possible cause and symptoms Solution
High temperature trip out on
electric heater
Low air fl ow rate
Measure and estimate the air fl ow and pressure and compare
with the speci fi cation from customer.
Incorrect position of the klixon
Check that the klixon, is positioned in the air fl ow, relocate
klixon if necessary
Check that there is no heat transfer from the klixon support.
Fault Possible cause and symptoms Solution
Water found in the ventilation
section
Cooling mode:
water carried away from the coil because of
excessive air
fl ow and speed on the coil.
Estimate the air fl ow rate and check the speed is lower than
2,8 m/s
Low air pressure in the compartment due to
a high air
fl ow rate or a high pressure drop
before the fan
Check fi lter
Reduce air fl ow rate
Check seals around the ventilation section.
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.
Water ingress in the fi lter
compartment
Water ingress through a leaking fresh air hood
or when running 100% fresh air Check the seals and fl anges in the fresh air hood
Reduce the air fl ow rate if necessary
Fault Possible cause and symptoms Solution
Nothing is written on the screen
but it’s enlightened
Idem
Press on the three right-hand side’s buttons at the same time
during a few seconds then recon
fi gure display address setting
at 32.
Nothing occurs on the unit or an
option disappeared
Possible problem of units' con fi guration
Check the instructions from 3811 to 3833 and recon fi gure
options if necessary.
The message “no link” appears Problem of addresses’ recognition Disconnect the DS from the unit and then reconnect it.
All the units are extinct Problem main board plan addressing
Disconnect then re-plug; disconnect each unit from the others
then change all the plan addresses