20 Troubleshooting
Installer and user reference guide
54
RXYSQ6T7Y1B9
VRV IV-S system air conditioner
4P404677-1A – 2016.03
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.
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.
19.4.3
Recommended maintenance and
inspection cycles
Be aware that the mentioned maintenance and replacement cycles
do not relate to the warranty period of the components.
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
The table 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.
NOTICE
▪ The table indicates main components. Refer to your
maintenance and inspection contract for more details.
▪ The table 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.
19.4.4
Shortened maintenance and replacement
cycles
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).
Recommended replacement cycle of wear parts
Component
Inspection
cycle
Maintenance cycle
(replacements and/or
repairs)
Air filter
1 year
5 years
High efficiency filter
1 year
Fuse
10 years
Crankcase heater
8 years
Pressure containing parts
In case of corrosion,
contact your local dealer.
NOTICE
▪ The table indicates main components. Refer to your
maintenance and inspection contract for more details.
▪ The table indicates recommended intervals of
replacement 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. Contact
your dealer for details.
INFORMATION
Damage due to taking apart or cleaning interiors of units by
anyone other than our authorised dealers may not be
included in the warranty.
20
Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire. Contact your dealer.
The system must be repaired by a qualified service person:
Malfunction
Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does not properly work.
Turn off the main power
switch.
If water leaks from the unit.
Stop the operation.
The operation switch does not work
well.
Turn off the power.
If the user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
Notify your installer and
report the malfunction
code.
