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English
Items to be checked
In case of defective
Check
column
Is the insulation of refriger-
ant piping and drain piping
completely carried out?
Water leakage
Does the drain flow out
smoothly?
Water leakage
Is the power supply voltage
identical to that stated on
the name plate of the air
conditioner?
Does not operate ·
burnout
Are you sure that there is no
wrong wiring or piping or no
loose wiring?
Does not operate ·
burnout
Is grounding completed?
Danger in case of
leakage
Are the sizes of electric
wiring according to the
specification?
Does not operate ·
burnout
Are any of discharge or
suction of the indoor and
outdoor units blocked with
obstacles?
(It may lead to capacity drop
due to fan speed drop or
malfunction of equipment.)
Does not cool/
Does not heat
Is the external static pres
-
sure set correctly?
Does not cool/
Does not heat
Have you recorded the
refrigerant piping length
and the refrigerant charge
amount added?
Refrigerant charge
amount is not clear
Make sure to recheck the items of “SAFETY CONSIDERATIONS”.
(2) Items to be checked at delivery
Items to be checked
Check
column
Have you carried out field setting? (if necessary)
Are the control box cover, the air filter and the suc
-
tion grille attached?
Does the cool air discharge during the cooling
operation and the warm air discharge during the
heating operation? Does the indoor unit makes
unpleasant sound of air discharge?
Have you explained how to operate the air
conditioner showing the operation manual to the
customer?
Have you explained the description of cooling,
heating, program dry and automatic (cooling/heat-
ing) given in the operation manual to the customer?
If you set the fan speed at thermostat OFF, did you
explain the set fan speed to the cus tomer.
Have you handed the operation manual and the
installation manual to the customer?
Have you checked that there is no generation of
abnormal noise (i.e., noise resulting from contami-
nation or missing parts)?
If an optional accessory is in use, did you check the
operation of the optional accessory and make field
settings as needed?
Is the remote controller icon displayed? Is the re
-
mote controller connected to the master unit if the
system is in simultaneous multi operation?
Have you explained failure examples of
3. SELECTION OF INSTALLATION LOCATION
?
Points of the operation explanation
In addition to the general usage, since the items in the
operation manual with the
WARNING and
CAUTION marks are likely to result in human bodily
injuries and property damages, it is neces sary not only
to explain these items to the customer but also to have
the customer read them.
Furthermore, it is necessary to have the customer read
through the troubleshooting items while explaining the
above items.
3. SELECTION OF INSTALLATION
LOCATION
Hold the hanger brackets at 4 locations to move the
indoor unit when unpacking or after unpacked, and do
not apply force to the piping (refrigerant and drain) and
discharge flange.
If the temperature and humidity in the ceiling is likely to
exceed 86°F (30°C), RH80%, use the additional insulation
stick to the indoor unit (Field supply).
Use the insulation such as glass wool or polyethylene
that has thickness of 3/8 in. (10 mm) or more. However,
keep the insulated outside dimension smaller than the
ceiling opening so that the unit may go through the open-
ing at installation.
(1) Select the installation location that meets the follow-
ing conditions and get approval of the cus tomer.
•
Where the cool and warm air spreads evenly in the
room.
•
Where there are no obstacles in the air passage.
•
Where drainage can be ensured.
•
Where the ceiling’s lower surface is not remarkably
inclined.
•
Where there is sufficient strength to withstand the
weight of the indoor unit. (If the strength is insufficient,
the indoor unit may vibrate and get in contact with the
ceiling and generate unpleasant chattering noise.)
•
Where a space sufficient for installation and service
can be ensured.
(Refer to Fig. 1 and Fig. 2)
•
Where the piping length between the indoor and the
outdoor units is ensured within the allowable length.
(Refer to the installation manual attached to the out-
door unit.)
•
Where there is no risk of flammable gas leak.
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