Troubleshooting - Daikin LMS Serie Betriebsanleitung

1 Remove the 4 screws (a) and remove the side plate (b) of the
evaporator.
2 Poor water into the drain pan (c).
a b c d e f
a Drain pipe or hose (external)
b Pipe clamp
c External drain connection (Ø 14 mm)
d Overflow tank
e Hot refrigerant pipes
f Drain pipe (internal)
g Overflow opening
h Drain pan pipe
i Drain pan
3 Check that the water evacuates through the drain pan pipe (h),
towards the overflow tank (d) in the condenser.
Result: If necessary; unclog the drain pan pipe.
4 Reinstall the side plate (b) with the 4 screws (a) on the
evaporator. Tighten the screws to a torque of 2.17 N•m.
8

Troubleshooting

If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut OFF the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electrical shock or fire. Contact your
dealer.
LMSEY1A09/13 + LMSEY2A19/25
Daikin LMS
4P728169-1B – 2023.07
The system MUST be repaired by a qualified service person.
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.
g h i
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.
If the system does not
operate at all.
Unit does not start
operating when pressing
ON/OFF key, the display
however is turned on.
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.
Malfunction
Malfunction
▪ Check if there is no power failure.
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.
▪ Check the door micro switch. The
switch must be actuated and the NO
contact must be closed when the
door is closed.
8 Troubleshooting
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 16].
Turn OFF the power
supply.
Notify your installer and
report the error code.
Measure
automatically restarts
Operation manual
17