8 Troubleshooting
Operation manual
18
LMSEY1A09/13 + LMSEY2A19/25
Daikin LMS
4P728169-1A – 2023.03
WARNING
If the internal wiring or the supply cable is damaged, it has
to be replaced by the manufacturer, its service agent or
similarly qualified persons.
The system MUST be repaired by a qualified service person.
Malfunction
Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates.
Turn OFF the main power
switch. Notify your
installer and report the
malfunction.
If water leaks from the condenser side
of the unit (water leaks from the
overflow tank).
Stop the operation.
▪ Check that the internal
drain
pipe
is
not
clogged.
▪ Check that the overflow
tank is not leaking.
If water leaks from the internal drain
pipe when all conditions are normal
(product, environment, door opening
frequency, …).
Install an external drain
pipe to evacuate the water
towards a drain system.
If no circumstances have changed
(product, environment, door opening
frequency, …) and water suddenly
starts to leak from the internal drain
pipe.
Check the origin of the
abundant water:
▪ Check for openings or
cracks in the cold room
walls, door seal or unit
insulation. This would
allow moist containing
air to enter the cold
room.
▪ Check that the cold
room roof is not leaking.
If water leaks from the drain pan under
the evaporator.
Check that the drain pan
pipe is not clogged. See
"7.3 To check the drain
pan pipe" [
4
17].
The operation switch does NOT work
well.
Turn OFF the power
supply.
If the user interface display indicates an
alarm.
Notify your installer and
report the error code.
If the system does NOT operate properly except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system in accordance with the following
procedures.
Malfunction
Measure
If the system does not
operate at all.
▪ Check if there is no power failure.
Wait until power is restored. If power
failure occurs during operation, the
system
automatically
restarts
immediately after power is restored.
▪ Check if no fuse has blown or breaker
is activated. Change the fuse or reset
the breaker if necessary.
▪ Check if the mains cable is still
connected properly.
Unit does not start
operating when pressing
ON/OFF key, the display
however is turned on.
▪ Check the door micro switch. The
switch must be actuated and the NO
contact must be closed when the
door is closed.
Malfunction
Measure
Compressor stops. The
unit is equipped with an
overtemperature device
which stops the
compressor every time the
max. allowable
temperature of motor
windings is exceeded.
Possible causes are:
▪ Insufficient ventilation of
the room where the unit
is installed.
▪ Anomaly
in
mains
voltage.
▪ Faulty
operation
of
condenser fan.
Device reset is automatic
after temperature dropped
to normal.
▪ Check if air inlet or outlet of the unit
condenser
is
not
blocked
by
obstacles. Remove any obstacles
and make sure the air can flow freely.
▪ Check
power
supply
(voltage).
Correct if necessary.
▪ Check operation of the condenser
fan. If it is not working, contact your
dealer.
The system stops
immediately after starting
operation.
▪ Check if air inlet or outlet of outdoor
or indoor unit is not blocked by
obstacles. Remove any obstacles
and make sure the air can flow freely.
The system operates but
cooling is insufficient.
▪ Check if air inlet or outlet of the unit
evaporator
is
not
blocked
by
obstacles. Remove any obstacles
and make sure the air can flow freely.
▪ Check if the evaporator inside the
cold room is not frosted up. Defrost
the unit manually, or shorten the
defrost operation cycle.
▪ Check if there are not too many
articles inside the cold room, see
Loading the goods. Remove a couple
of articles.
▪ Check
if
there
is
smooth
air
circulation inside the cold room.
Reorganise the articles inside the
cold room, see Loading the goods.
▪ Check if there is not too much dust on
the condenser. Remove the dust, see
To clean the interior.
▪ Check if there is cold air leaking out
of the cold room. Stop the air from
leaking outside.
▪ Check if you did not set the
temperature too high. Set the setpoint
appropriately, see To set the Set
Point.
▪ Check
if
there
are
no
high-
temperature articles stored in the cold
room. Always store articles after they
have cooled down.
▪ Check if the door is not opened too
long. Reduce the opening time of the
door.
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
Summary of Contents for LMSEY1A09AVM01
Page 124: ...2 124 LMSEY1A09 13 LMSEY2A19 25 Daikin LMS 4P728169 1A 2023 03 12 m3...
Page 125: ...2 125 LMSEY1A09 13 LMSEY2A19 25 Daikin LMS 4P728169 1A 2023 03 R290 R290...
Page 126: ...3 126 LMSEY1A09 13 LMSEY2A19 25 Daikin LMS 4P728169 1A 2023 03 10 50 V DC III 3 3 1 LMSEY R290...
Page 140: ...8 140 LMSEY1A09 13 LMSEY2A19 25 Daikin LMS 4P728169 1A 2023 03 7 3 4139...
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