Lennox ROOFTOP FLEXY FXK 100, Инструкция по установке, эксплуатации и обслуживанию

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IOM – FLEXY II – 1007 – E Page 93
ELECTRICAL HEATER
FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION
Low airf low rate
Measure and estimate the airflow and pressure
and compare with the specification from
customer.
High Temperature trip
out on electric heater
Incorrect position of the Klixon
Check that the Klixon, is positioned in the airf low,
relocate Klixon if necessary
Check that there is no heat transf er f rom the
Klixon support.
WATER LEAKS
FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION
Cooling mode:
Water carried away f rom the coil because of
excessiv e airf low and speed on the coil.
Estimate the airflow rate and check the speed is
lower than 2.8 m/s
Low air pressure in the compartment due to a
high airf low rate or a high pressure drop before
the f an
Check f ilter
Reduce airflow rate
Water found in the
v entilation section
Check seals around the v entilation section.
Check the door seal
Check f or the presence of silicone seals in the
corners of the door and at the bottom of the
ref rigeration section bulkhead.
Water ingress in the
f ilter compartment
Water ingress through a leaking fresh air hood or
when running 100% f resh air
Check the seals and f langes in the f resh air hood
Reduce the airflow rate if necessary
DC50 & DS50
FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION
DC50: Nothing is
written on the screen
but it’s enlightened
Problem of addressing pLAN on the DC50
Press on the three right-hand side’s buttons at
the same time during a f ew seconds then
reconf igure the terminal address
(Conf er DC addressing procedure)
DS50: 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 f ew seconds then
reconf igure display address setting at 32.
Nothing occurs on the
unit or an option
disappeared
Possible problem of units' conf iguration
Check the instructions f rom 3811 to 3833 and
reconf igure options if necessary.
DS50 & DC50: the
message “No Link”
appears
Problem of addresses’ recognition
Disconnect the DS50 f rom the unit and then
reconnect it.
All the units are extinct Problem BM50 pLAN addressing
Disconnect then re-plug; disconnect each unit
from the others then change all the pLAN
addresses
MAINTENANCE DIAGNOSTIC