Sirge KFR-25GW/BPWa, Service Manual

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21
The cooling/heating load of the
room is heavy or the room is not
closed perfectly
Calculate the area of the room,
check the close of the room
Enlarge the capacity of the
units,
improve the
leakproofness of the room
Insufficient refrigerant R410A Measure the operating current
Add R410A ? welding the
leaked point
Too much R410A
Air intake temp is too low,
condensation water on air
intake pipe is too much, temp
of discharge is too high
Discharge a little R410A
Effect of heat exchange is too
poor Dust on outdoor condenser and
indoor filter is too much
Cleanup filter and condenser
Some of the windings of motor
fan is short-circuit, so cause
speed decline
Speed of indoor/outdoor fan is
too low, air circulation is small
Repair or replace motor
Running condition is too bad
Check if the installation is
proper; outdoor temp is too
high when heating
Improve the condition, use
auxiliary heating
Convexity exists in compressor or valve or lock of compressor
No high-low pressure
difference, no clear temp
difference in air intake inlet or
discharge outlet of compressor
Replace compressor or valve
Openness of check valve is too
small or the system partly or
completely blocked
Check the openness; partly
frost on outdoor pipe system
Open the valve; use high
pressure N
2
to clean out the
block
3.3 Big noise or abnormal sound
Reason Check to be made Proposed remedy
Foreign matters in wind guide
or impeller fan
Check if they are Clear away
Fan is distorted or in bad
balance
Check them Replace indoor/outdoor fan
Improper location of fan, so fan
touches the housing Open the unit or move the fan
manually, find the location
Adjust the position
Bearing of the fan is sluggish or
destroyed
Check the bearing Replace the bearing
Connecting pipe vibrates due to
improper installation, or touch
the lower frame
Check the connecting pipe
Tidy up the pipes, eliminate
the noise source
Outdoor pipes touches
Check the vibration of the
pipes, check if them touch
Tidy up the pipes
Abrasion of the parts of
compressor Check if the sound of
compressor is normal
Replace the compressor
3.4 Frequently switch on/off of the compressor
Reason Check to be made Proposed remedy
Running voltage is too low Measure the voltage
Add measures of voltage
stabilization
Discharge temp is too high caused by insufficient of R410A, compressor is protected by overheat
Check condensation of air
intake pipe or measure if
operating current is lower than
rated current
Check leakage point, welding
or add R410A