10T8Y1B
VRV-W IV System Air Conditioner
4P399208-1 – 2015.01
Installation and operation manual
53
Check that the inlet temperature of the heat source water is
within range.
Check if the water flow of the heat source water is within range.
3
The system operates but cooling or heating is insufficient:
Check that the air inlet or outlet of the indoor unit is not
blocked by obstacles. Remove any obstacles and make it
well-ventilated. Check that the water inlet or outlet of the
outdoor unit is not blocked.
Check that the air filter is not clogged (refer to "Maintenance"
in the indoor unit manual).
Check the temperature setting.
Check the fan speed setting on your user interface.
Check for open doors or windows. Close doors and windows
to prevent wind from coming in.
Check if there are too many occupants in the room during
cooling operation. Check if the heat source of the room is
excessive.
Check if direct sunlight enters the room. Use curtains or
blinds.
Check if the air flow angle is proper.
Check if the inlet water temperature of the heat source water
is within range.
Check if the water flow of the heat source water is within
range.
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the air conditioner (with manufacturing number if
possible) and the installation date (possibly listed on the warranty
card).
11. After-sales service and warranty
11.1. Warranty period
This product includes a warranty card that was filled in by the
dealer at the time of installation. The completed card has to be
checked by the customer and stored carefully.
If repairs to the air conditioner are necessary within the warranty
period, contact your dealer and keep the warranty card at hand.
11.2. After-sales service
11.2.1
Recommendations for maintenance and inspection
Since dust collects when using the unit for several years,
performance of the unit will deteriorate to some extent. As taking
apart and cleaning interiors of units requires technical expertise and
in order to ensure the best possible maintenance of your units, we
recommend to enter into a maintenance and inspection contract on
top of normal maintenance activities. Our network of dealers has
access to a permanent stock of essential components in order to
keep your air conditioner in operation as long as possible. Contact
your dealer for more information.
When asking your dealer for an intervention, always state:
The complete model name of the air conditioner.
The manufacturing number (stated on the nameplate of the unit).
The installation date.
The symptoms or malfunction, and details of the defect.
11.2.2
Recommended inspection and maintenance cycles
Be aware that the mentioned maintenance and replacement cycles
do not relate to the warranty period of the components.
Table 1: "Inspection Cycle" and "Maintenance Cycle" list
Table 1 assumes the following conditions of use:
Normal use without frequent starting and stopping of the unit.
Depending on the model, we recommend not starting and
stopping the machine more than 6 times/hour.
Operation of the unit is assumed to be 10 hours/day and
2,500 hours/year.
Table 1
11.3. Shortening of "maintenance cycle" and
"replacement cycle" needs to be considered in
following situations
The unit is used in locations where:
Heat and humidity fluctuate out of the ordinary.
Power fluctuation is high (voltage, frequency, wave distortion,
etc.) (the unit cannot be used if power fluctuation is outside the
allowable range).
Bumps and vibrations are frequent.
Dust, salt, harmful gas or oil mist such as sulphurous acid and
hydrogen sulfide may be present in the air.
The machine is started and stopped frequently or operation time
is long (sites with 24 hour air-conditioning).
WARNING
Do not modify, disassemble, remove, reinstall or
repair the unit yourself as incorrect dismantling or
installation may cause an electric shock or fire.
Contact your dealer.
In case of accidental refrigerant leaks, make sure
there are no naked flames. The refrigerant itself is
entirely safe, non-toxic and non-combustible, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
Component
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
Electric motor
1 year
20,000 hours
PCB
25,000 hours
Heat exchanger
5 years
Sensor (thermistor, etc.)
5 years
User interface and switches
25,000 hours
Drain pan
8 years
Expansion valve
20,000 hours
Solenoid valve
20,000 hours
NOTICE
1
Table 1
indicates main components. Refer to your
maintenance and inspection contract for more details.
2
Table 1
indicates recommended intervals of
maintenance cycles. However, in order to keep the
unit operational as long as possible, maintenance
work may be required sooner. Recommended
intervals can be used for appropriate maintenance
design in terms of budgeting maintenance and
inspection fees. Depending on the content of the
maintenance and inspection contract, inspection and
maintenance cycles may in reality be shorter than
listed.
