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Note 1. If the test is started without setting the SWA as shown below, both refrigerant circuit will start the opera-
tions.
To test each refrigerant circuit individually, set SWA as follows:
Note 2. When error lamps on indoor unit illuminate during test run, check codes will be displayed on the remote
controller. Refer to VII. (Troubleshooting ) for the meaning of each check code.
Note 3. Turn on DIPSW3-7 of the outdoor unit (while the unit is not in operation) when unable to continue the
operation during low-load operation.
Be sure to turn them off after test run.
Note 4. For 1-refrigerant systems, skip items 3, and 6 through 13 above.
Slide Switch SWA on the address
board of indoor unit
SWA Setting
Unit Operation
Runs test when so directed
Remain at a halt
1
3
Remarks
Factory Setting
The unit will take up to 35 minutes to warm up the compressor when outdoor unit is
cooled while DIPSW2-7 are on (Factory Setting - OFF) and liquefied refrigerant
has accumulated in the compressor.
The unit will start after the compressor has sufficiently warmed up. (When outdoor
temperature is under 5˚C the unit will not start for up to 30 minutes. During this time
the unit will be in a fan mode.
Symptoms
Display on the
Remote Controller
Cause
Outdoor unit will
not start
Normal display
· Do not install the unit in or around residential areas
where noise levels are to be kept down.
· Consult us if concerned about the effects of noise.
· Place equipment that is likely to be affected by noise
(wireless microphone receiver or antenna etc.) as far
away as possible from the unit's transmission lines,
power source line, and the body of the unit.
· Isolate the power supply line of the equipment that
emits a large amount of noise from air-conditioning
power source, and keep them as far away as possi-
ble from transmission lines, power-supply line, and
the body of the unit.
Symptoms
Caution
The phenomena below are also a part of normal operations
Remedies
Outdoor unit
noise
The noise level listed in product specification is the
level measured in an anechoic room. Noise level
may vary considerably depending on the environ-
ment in which the unit is installed.
Air conditioners use microcomputers, and they
emit a minute amount of electric noise from the
power source, transmission lines, and the body of
the units. Air conditioners may have an adverse ef-
fect on equipments that uses electrically fine sig-
nals (wireless microphones, medical equipments
etc) and may cause them to malfunction if used in
close proximities, or vice versa, Try the remedies
listed on the right if this kind of problems are antici-
pated.
Effects of noise
3
3
Not to Be Alarmed When the Following Symptoms Appear
