Daikin LMSEY1A09AVM01 Operation Manual page 18

8 Troubleshooting
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
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates.
If water leaks from the condenser side
of the unit (water leaks from the
overflow tank).
If water leaks from the internal drain
pipe when all conditions are normal
(product, environment, door opening
frequency, ...).
If no circumstances have changed
(product, environment, door opening
frequency, ...) and water suddenly
starts to leak from the internal drain
pipe.
If water leaks from the drain pan under
the evaporator.
The operation switch does NOT work
well.
If the user interface display indicates an
alarm.
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
If the system does not ▪ Check if there is no power failure.
operate at all. Wait until power is restored. If power
failure occurs during operation, the
system
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 ▪ Check the door micro switch. The
operating when pressing switch must be actuated and the NO
ON/OFF key, the display contact must be closed when the
however is turned on. door is closed.
Operation manual
18
Measure
Turn OFF the main power
switch. Notify your
installer and report the
malfunction.
Stop the operation.
▪ Check that the internal
drain pipe is not
clogged.
▪ Check that the overflow
tank is not leaking.
Install an external drain
pipe to evacuate the water
towards a drain system.
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.
Check that the drain pan
pipe is not clogged. See
"7.3 To check the drain
pan pipe" [ 4 17].
Turn OFF the power
supply.
Notify your installer and
report the error code.
Measure
automatically restarts
Malfunction
Compressor stops. The ▪ Check if air inlet or outlet of the unit
unit is equipped with an condenser
overtemperature device obstacles. Remove any obstacles
which stops the and make sure the air can flow freely.
compressor every time the
▪ Check
max. allowable
Correct if necessary.
temperature of motor
▪ Check operation of the condenser
windings is exceeded.
fan. If it is not working, contact your
Possible causes are:
dealer.
▪ 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.
The system stops ▪ Check if air inlet or outlet of outdoor
immediately after starting or indoor unit is not blocked by
operation. obstacles. Remove any obstacles
and make sure the air can flow freely.
The system operates but ▪ Check if air inlet or outlet of the unit
cooling is insufficient. evaporator
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
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
temperature too high. Set the setpoint
appropriately, see To set the Set
Point.
▪ Check
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).
Measure
is not blocked by
power supply (voltage).
is not blocked by
if there is smooth air
if you did not set the
if there are no high-
LMSEY1A09/13 + LMSEY2A19/25
Daikin LMS
4P728169-1A – 2023.03