Airwell JSP023054, Service Manual

Page: 28 / 66

ELECTRONIC FUNCTION
Version - 1 28 DCH DCI
9.3 Main Protection
9.3.1 Three minutes delay at restart
for compressor
Less than 1 minute delay for the 1
st
time start-
up and 3 minutes delay for others.
9.3.2 Temperature protection of
compressor top
The unit will stop working when the compressor
top temp. protector cut off, and will restart after
the compressor top temp. protector restart.
9.3.3 Temperature protection of
compressor discharge
Compressor discharge temp. T5>115
℃
for 5s,
compressor stops.
9.3.4 Fan speed is out of control
When indoor fan speed keeps too low
(300RPM) for certain time, the unit will stop and
the LED will display the failure.
9.3.5 Inverter module protection
The Inverter module has a protection function
about current, voltage and temperature. If these
protections happen, the corresponding code will
display on indoor unit and the unit will stop
working.
9.3.6 Indoor fan delayed open
function
When the unit starts up, the louver will be active
immediately and the indoor fan will open 7s
later.
If the unit runs in heating mode, the indoor fan
will be also controlled by anti-cold wind
function.
9.3.7 Compressor preheating
functions
Preheating permitting condition:
When T4(outdoor ambient temperature)
＜
3°C,
the preheating function will be activated.
9.3.8 Sensor protection at open
circuit and breaking
disconnection.
When there’s only one temperature sensor in
malfunction , the air conditioner will keep
working but show the error code, in case of any
emergency use.
When there’s more than one temperature sensor
in malfunction, the air conditioner will stop
working.
9.3.9 Refrigerant leakage detection
This function is only active in cooling mode. It
can better prevent the compressor being
damaged by refrigerant leakage or compressor
overload.
Open condition:
When compressor is active, the value of the Coil
temperature of evaporator T2 has no change or
very little change.