Installation manual
11
Example of correction of wiring error
In case that the wiring error check was not interrupted, the LED
lighting sequence after the automatic wiring correction in this
example is 2
→
1
→
3
→
4
→
5.
Test run and final check
To test cooling, set for the lowest temperature. To test heating,
set for the highest temperature. (Depending on the room
temperature, only heating or cooling (but not both) may be
possible.)
After the unit is stopped, it will not start again (heating or cooling)
for approximately 3 minutes.
During the test run, first check the operation of each unit
individually. Then also check the simultaneous operation of all
indoor units.
Check both heating and cooling operation.
After running the unit for approximately 20 minutes, measure the
temperatures at the indoor unit inlet and outlet. If the
measurements are above the values shown in the table below,
then they are normal.
During cooling operation, frost may form on the gas stop valve
or other parts. This is normal.
Operate the indoor units in accordance with the included
operation manual. Check that they operate normally.
Items to check
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
Piping connection between outdoor unit and indoor unit (from
port A, B, ... on the outdoor unit to indoor unit A, B, ...)
Wiring connection from the outdoor unit terminal board to the
indoor units.
NOTE
1
For 2 rooms, LED 3, 4 and 5 do not light up, and
for 3 rooms, LED 4 and 5 do not light up. For 4
rooms, LED 5 does not light up.
2
If the outside air temperature is
≤
5°C
, the wiring
error check function will not operate.
3
After wiring error check operation is completed,
LED indication will continue until ordinary
operation starts. This is normal.
4
Follow procedures as mentioned on the service
sticker on the rear side of the service cover.
Cooling
Heating
Temperature difference between
inlet and outlet
±8°C
±20°C
A
B
C
D
E
A
B
C
D
E
Check
Symptom
Are the indoor units installed
securely?
Falling, vibration, noise.
Has an inspection been made to
check for gas leakage?
No cooling, no heating.
Has complete thermal insulation
been done (gas pipes, liquid
pipes, indoor portions of the drain
hose extension)?
Water leakage.
Is the drainage secure?
Water leakage.
Are the earth wire connections
secure?
Danger in case of an earthing
fault.
Are the electric wires connected
correctly?
No cooling, no heating.
Is the wiring in accordance with
the specifications?
Operation failure, burning.
Are the inlets/outlets of the indoor
and outdoor units free of any
obstructions?
Are the stop valves open?
No cooling, no heating.
Do the marks match (room A,
room B) on the wiring and piping
for each indoor unit?
No cooling, no heating.
Is the priority-room setting set for
2 or more rooms?
The priority-room setting will not
function.
ATTENTION
Have the customer actually operate the unit while
looking at the manual included with the indoor unit.
Instruct the customer how to operate the unit correctly
(particularly cleaning of the air filters, operation
procedures, and temperature adjustment).
Even when the air conditioner is not operating, it
consumes some electric power. If the customer is not
going to use the unit soon after it is installed, turn OFF
the breaker to avoid wasting electricity.
