Airwell AWAU-YDV1010-H13, Service Manual

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155
Failure code
Outdoor
digital
display tube:
77
Indoor wired
controller:
4D
Indoor unit LED status
LED5 Failure description:
Oil balancing protection failure between
outdoor units 20 times
Outdoor unit LED status
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
Flow Logic III series
Diagnosis Troubleshooting
2. Abnormity detection method
◆
Turn on or off the SV9/SV10,
check if the temperature of Toilp
of corresponding outdoor units
increases by more than 10
℃
during oil balancing;
◆
Check the SV9/SV10 of
corresponding outdoor units for
inner leakage and if they can be
turned on;
◆
Check if detection
temperature of the Toilp of
corresponding outdoor units is
correct;
◆
Check the oil balance pipeline
of units for blockage.
3. Abnormity confirmation
conditions
Alarm to shut down when ToilpB-
ToilpA≤10°C
[Note]The ToilpA and ToilpB are
the temperatures of oil balance
pipe when the oil balance pipe is
switched on/off.
4. Possible causes
◆
The oil balance
electromagnetic valves cannot
be switched on;
◆
Inner leakage occurs when
the oil balance electromagnetic
valves are switched off;
◆
The temperature detected by
Toilp sensor is incorrect;
◆
The oil balance pipe is
blocked.
◆
The allowed operation range
is exceeded and it becomes
difficult to switch on the
electromagnetic valves due to
reinforced oil viscosity caused
by low ambient temperature.
Turn on or off the SV9/SV10,
check if the temperature of Toilp
of corresponding outdoor units
increases by more than 10°C
during oil balancing
Check if the SV9/SV10 of corresponding
outdoor units can be turned on
Check if the detection value of Toilp
sensor is correct.
Check the solenoid valve for inner
leakage when it is switched off
Check the oil balance pipeline
of system for blockage
Check if the allowed operation range is exceeded
Use the units in accordance with
its allowed operation range.
F i n d o u t t h e c a u s e w h y t h e
electromagnetic valve cannot be
switched on and rectify it by after-
sales personnel on site.
Check the detection probe of
sensors for looseness and the
resistance for drift, and rectify it.
Replace the electromagnetic valve
with inner leakage by after-sales
personnel.
Rectify on site by after-sales
personnel.
[Note] Check if the oil balance stop
valves of outdoor units are opened.
Y
Y
Y
N
N
N
N
N
Y
Y