39
.●
System maintenance
Malfunction analyze and eliminating
Phenomenon
Reason
Check
Clear
Machine does
not work
Power cut/outage
Measure the voltage
of circuitry
Wait for power resume
The operation
panel has
display, but
machine can not
turn on, key
failure
Operation panel
lines not connected
Check the circuitry
connect
Operation panel
damaged
Substitution method
Replace operation panel
disturbed
Check the source of
interference
Clear the source of
interference
If the line
lengthened by the
non-shielded cable
Replace the line(use
shielded cable)
Low voltage
Check the circuitry
voltage
Replace the line or
increase voltage stabilizer
PCB damaged
Substitution method
Replace PCB
Machine does
not
work
operation panel
no display
Transformer
damaged
Measure with
multi-meter
Replace transformer
Operation panel
lines not connected
well
Check the circuitry
Welding with soldering
iron
Operation panel
damaged
Substitution method
Replace operation panel
PCB damaged
Substitution method
Replace PCB
disturbed
Check the source of
interference
Clear the source of
interference
If the line
lengthened by the
non-shielded cable
Replace the line(use
shielded cable)
Fan does not
work
Fan blade is stuck
Check the fan blade
Clear foreign body
The sub
High
pressure(fan
uninstall) system’
pressure over
high
sub high pressure
switch damaged
Check the sub high
pressure
Replace(short it)
Too
much refrigerant
Check the pressure
Discharge some
refrigerant
Water system dirty
Check if filter is
installed
Clean water system and
install filter
Check water system
Clean
water system
Lack of water flow
Check filter
Clean filter
Water pump
damaged
Check water pump
Replace water pump
Содержание NL-BKDX100-400II/R
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