Installation and Commissioning Guide
Wall Hung Split System
Installation and Commissioning Guide - Wall Hung Split System
Doc. No.9590-5007
Ver. 2 210416
47
Outdoor Unit
Parts
Service Frequency
Detail of Service Check
Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
2
Yrs
3
Yrs
4
Yrs
5
Yrs
Casing / Panels
and Frames
Visual check for
damage, rust and dust
accumulation.
For highly corrosive environment,
wash panels quarterly with water
& neutral detergent solution. Wax
panels. Repair / re-paint where
required.
Insulation
Visual check for
insulation conditions.
Repair / replace insulation material.
Fan
Visual check for run out
of balance and dust
accumulation.
Clean off dust as necessary to
negate possibility of fan running
out of balance.
Motor
Ω
Visual check on wiring.
Insulation resistance
check to be carried out
annually.
Measure insulation resistance.
Should be more than 1MΩ.
Heat
Exchanger
Check for clogging by
dust. Check for leaks /
damage.
Clean air inlet side as necessary.
Straighten any bent fins using fins
comb.
Condensate
Drain Line
(if available)
Check for obstructions &
free flow of water.
Clean to eliminate obstructions/
sludge & check condition of drain
line. Pour water to ensure free flow.
Compressor
Ω
Check for high / low
pressure. Measure
insulation resistance.
Check compressor
for abnormal noise/
vibrations.
Measure insulation resistance.
Should be more than 1MΩ. Ensure
to isolate first the VSD from the
compressor before measuring
insulation resistance.
Compressor
drive
For variable drive
compressor check
full operation of drive
from minimum hertz
to maximum, check fan
operation of drive.
Check compressor amperage &
running frequency feedback from
outdoor board seven segment
display.
Ensure drive fresh air
path is clear and drive fan
is operating correctly.
Check ventilation holes on top and
bottom of drive cover are clear of
leaves, pebbles or dirt.
Refrigeration
Operational
Readings
Make note of operational
reading in test cool/heat
mode.
Check operating pressures, record
super heat & sub-cool values.
Safety
Devices
Check calibration of
safety devices.
Check resistance of sensors,
pressure cut in / cut out of
pressure controls.
Faults
Check for any previous
fault history on unit.
Investigate any causes for previous
faults, reset fault history.
