English
15
11-3 Onerous Repairs (Outside Scope of
Warranty Coverage)
11-3-1 Accidents Resulting from Use
beyond Standards for Use
• Use beyond Limits
• Applications other than its designed purpose of
use or modification.
Standards for Use
11-3-2 Selection, Installation, Work Failures
Specified below and Other Failures
Note: Asterisk-marked items show concrete exam-
ples.
1. Model selection failures
• A model not suitable for storage applications is
selected.
∗
The cooling of products not reaching the tar-
get storage temperatures.
• Cooling overloading or underloading judged by
our dealer.
∗
The frequency of stoppage is 6 or more times
per hour or the set cooling temperature is not
attained.
2. Installation failure (Installation and environ-
mental problems)
• The unit is not installed on a stable horizontal
plane.
∗
The unit is not fixed securely.
• The environmental conditions of the place of
installation differ from normal atmospheric con-
ditions.
∗
Briny air environment, shore side, oil mist
environment, kitchen exhaust side, other cor-
rosive gas and adhesive mist environment.
• The place of installation had poor ventilation
and heat dissipation.
∗
The machine took in exhausted air again.
3. Work failure
• The interior of the piping was not vacuum dried
sufficiently.
∗
The clogging of the thin areas of the piping
caused by icing.
• The interior of the piping was not sufficiently air-
tight.
∗
Leakage of refrigerant gas.
• The interior of the piping was contaminated
with foreign substance.
∗
The clogging of the thin areas of the piping.
• The unit was adversely affected by on-site
modification work.
∗
The use of the unit beyond the operating temper-
ature range as a result of on-site modification.
• An accident resulted from the improper han-
dling of the unit under installation work.
∗
The loosening or wobbling of the outer panel
or broken or bent damage to the piping.
4. Operational failure
• Temperature settings for stored objects were
wrong.
∗
The storage of vegetables at temperatures
below 0°C.
• The periodical maintenance of the unit was
neglected.
∗
The clogging of the air heat exchanger, rust
generation from each part, gas leakage, and
icing of the indoor unit (showcase and unit
cooler).
5. Others
• Improvements recommended by our dealer in
advance were not accomplished.
∗
The simultaneous starting and stopping of a
number of units.
• Accidents were caused by natural disaster or
fire.
∗
Damage to electrical parts caused by lightning.
• There were other installation and operational
problems beyond common sense.
∗
The use of the unit without heat insulation
work on the piping.
• Work was conducted without keeping the fol-
lowing showcase restrictions.
<Showcase restrictions>
· The design pressure for the indoor unit is 2.5
MPa or more.
· The installation of the thermostatic expansion
valve and liquid supply solenoid valve (both of
which are for R410A) on a showcase basis.
Thermal insulation of feeler tube of thermo-
static expansion valve must be thermal insu-
lated.
· Install showcases on the same floor if the show-
cases are connected to a single outdoor unit.
Standards for Use
Item
Outdoor unit
Booster unit
Power supply Voltage
fluctuation
Within ±10% of rated voltage
Outdoor temperature
range (Cool)
-5ºC~+43ºCDB
-15ºC~+43ºCDB
Outdoor temperature
range (Heat)
-15ºC~21ºCDB
-15ºC~15.5ºCWB
Connecting piping
length
Within 130 m
(Piping length
between Indoor and
Outdoor unit)
Within 30 m
(Piping length
between Indoor and
Booster unit)
Height difference
between inside and
outside units
Within 35 m
(within 10 m if the out-
side unit is lower)
Within 10 m
(within 0 m if the
booster unit is lower)
Height difference
between outside unit
and booster unit
Within 35 m (within 10 m if the outside unit is
lower)
Height difference
between inside units
(Air-condition side)
Within 0.5 m
Height difference
between inside units
(Showcase side)
Within 5 m
