Daikin VRV III RQQ8-48PY1, Руководство по обслуживанию

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Si341213 Penyelesaian Masalah Menggunakan Remote Kontrol
135 Diagnosis Servis
PERIKSA 3 Memeriksa Faktor-Faktor Operasi
Overheat (

5)
Mengidentifikasi titik kerusakan dengan mengacu pada analisis faktor kegagalan (FTA)
berikut.
Defective hot
gas bypass
control
(

1)
Hot gas circuit clogging
Defective katup
solenoid coil
Defective katup
solenoid body
Defective control PCB

Check if coil resistance and insulation
are normal.
Temperature
increase of
discharge
Defective
discharge
pipe
temperature
control
[In cooling mode only]
Defective
subcooling katup
ekspansi
elektronik control
(EV2)
(

2)
Subcooling
katup
ekspansi
elektronik
failure
Control
failure
Defective valve coil
Defective valve
body
Defective sensor
tekanan rendah
Defective outlet
penukar panas
subcooling termistor
Defective control
PCB

Check if coil resistance and
insulation are normal.

Check if the voltage property is
normal.

Check if the connector is connected properly.
Check if the termistor resistance property is
normal.

Check if the pressure value given by the
service checker corresponding to actual
measurement value by the sensor.
pipe
Compressor
overheat
[In cooling mode]
If the katup
ekspansi
elektronik unit
indoor is
excessively
throttled. (

3)
Defective
superheated
degree
control.
Defective four
way valve
operation
Superheat due to
shaft damage
Superheat due to
defective compressor
Katup ekspansi
elektronik unit
indoor failure
Defective control
Four way valve is in the
middle position.
Leak from hot gas bypass
valve
Defective valve coil
Defective valve body
Defective termistor for
indoor unit gas pipe
Defective termistor for
indoor unit pipa cairan
Defective control PCB

Check if the piping temperature connected
to the four way valve is normal.

Check if coil resistance and insulation are
normal.

Check if the connector is connected properly.
Check if the termistor resistance property is
normal.

Check if the connector is connected properly.
Check if the termistor resistance property is
normal.
Kekurangan
Refrigeran
Large resistance
of piping
Irregular piping length
Bend/collapse
(Including moisture choke)
Stop valve is closed.

Does the piping length fall in the permissible range?

Conduct visual checks.

Remove the moisture by vacuum break.

Check if the stop valve is open.
Catatan:

1. Refer to
“Low pressure Kendali Perlindungan” for hot gas bypass control.

2. Refer to “
Subcooling katup ekspansi elektronik
control”.

3.
“Superheating temperature control” in cooling mode is conducted by katup ekspansi
elektronik unit indoor.

4. Judgement criteria of superheat operation:
(1) Suction gas superheating temperature: 10 degrees and over. (2) Discharge gas
superheated temperature: 45 degrees and over, except for immediately after starting and
drooping control, etc.
(Use the above stated values as a guide. Depending on the other conditions, the unit may be
normal despite the values within the above scope.)