Daikin ERQ, Руководство по обслуживанию

Страница: 162 / 260

Symptom-based Troubleshooting ESIE09-05
152 Troubleshooting
8 The airflow rate
is not
reproduced
according to the
setting.
Even pressing the AIRFLOW
RATE SET button makes no
changes in the airflow rate.
In heating operation, when the
room temperature reaches the set
degree, the outdoor unit will stop
while the AHU is brought to fan LL
operation so that no one gets cold
air.
Furthermore, if fan operation
mode is selected when other AHU
is in heating operation, the system
will be brought to fan LL
operation.
(The fan LL operation is also
enabled while in oil return mode in
cooling operation.)
Normal operation.
10 A white mist
comes out from
the system.
<AHU>
In cooling operation, the
ambient humidity is high.
(This AHU is installed in a
place with much oil or dust.)
Uneven temperature distribution
due to heavy stain of the inside of
the AHU
Clean the inside of the AHU.
<AHU>
Immediately after cooling
operation stopping, the
ambient temperature and
humidity are low.
Hot gas (refrigerant) flown in the
AHU results to be vapor from the
unit.
Normal operation.
<AHUs and outdoor units>
After the completion of
defrosting operation, the
system is switched to heating
operation.
Defrosted moisture turns to be
vapor and comes out from the
units.
Normal operation.
11 The system
produces
sounds.
<AHU>
Immediately after turning ON
the power supply, AHU
produces "ringing" sounds.
These are operating sounds of
the electronic expansion valve of
the AHU.
Normal operation.
This sound becomes low after a
lapse of approximately one
minute.
<AHUs and outdoor units>
"Hissing" sounds are
continuously produced while in
cooling or defrosting operation.
These sounds are produced from
gas (refrigerant) flowing
respectively through the AHUs
and outdoor units.
Normal operation.
<AHUs and outdoor units>
"Hissing" sounds are produced
immediately after the startup or
stop of the system, or the
startup or stop of defrosting
operation.
These sounds are produced
when the gas (refrigerant) stops
or changes flowing.
Normal operation.
<AHU>
Faint sounds are continuously
produced while in cooling
operation or after stopping the
operation.
These sounds are produced from
the drain discharge device in
operation.
Normal operation.
<AHU>
"Creaking" sounds are
produced while in heating
operation or after stopping the
operation.
These sounds are produced from
resin parts expanding and
contracting with temperature
changes.
Normal operation.
<AHU>
Sounds like "trickling" or the
like are produced from AHUs
in the stopped state.
On VRV systems, these sounds
are produced when other AHUs in
operation. The reason is that the
system runs in order to prevent oil
or refrigerant from dwelling.
Normal operation.
<Outdoor unit>
Pitch of operating sounds
changes.
The reason is that the compressor
changes the operating frequency.
Normal operation.
12 Dust comes out
from the system.
Dust comes out from the
system when it restarts after
the stop for an extended period
of time.
Dust, which has deposited on the
inside of AHU, is blown out from
the system.
Normal operation.
13 Odors come out
from the system.
In operation Odors of room, cigarettes or else
adsorbed to the inside of AHU are
blown out.
The inside of the AHU should be
cleaned.
14 Outdoor unit fan
does not rotate.
In operation The reason is that fan revolutions
are controlled to put the operation
to the optimum state.
Normal operation.
Symptom Supposed Cause Countermeasure
Все каталоги и инструкции здесь: http : //splitoff.ru/tehn-doc.html