Nobu NBFS-48IDU, Руководство по обслуживанию

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the motor should be replaced when it is
damaged.
3
、
Check whether the controllable silicon and
other components on the electric control
board have damaged, replace the controllable
silicon or electric control board when they are
damaged.
F5 5 light
module of outdoor unit
fault
1
、
Check whether the connection of the
compressor is reliable, otherwise connect
firmly again.
2
、
Check whether the fixation between the IPM
module and the radiator is firm.
3
、
Check whether the compressor is well,
otherwise replace it.
4
、
Check whether the IPM module is abnormal,
otherwise replace it.
F6 6 light
The outdoor ambient
temp. sensor fault
1
、
Check whether the resistance of sensor is
normal, otherwise replace it.
2
、
Check whether the sensor wire is short circuit
or open circuit, and whether the plug is well
contacted, whether there is welding off or
rosin joint on the electric control board, repair
it if there is any above.
3
、
When the 1 and 2 are both normal, then the
components or integrated circuit is damaged,
the electric control board should be replaced.
F7 7 light
The outdoor unit coil
pipe temp. sensor fault
1
、
Check whether the resistance of sensor is
normal, otherwise replace it.
2
、
Check whether the sensor wire is short circuit
or open circuit, and whether the plug is well
contacted, whether there is welding off or
rosin joint on the electric control board, repair
it if there is any above.
3
、
When the 1 and 2 are both normal, then the
components or integrated circuit is damaged,
the electric control board should be replaced.
F9 9 light
The compressor
discharge temp. sensor
fault
1
、
Check whether the resistance of sensor is
normal, otherwise replace it.
2
、
Check whether the sensor wire is short circuit
or open circuit, and whether the plug is well
contacted, whether there is welding off or
rosin joint on the electric control board, repair
it if there is any above.
3
、
When the 1 and 2 are both normal, then the