INVENTOR P8MVI32-09WiFi, Service Manual

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10.3 Main Protection
10.3.1 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.
10.3.2 Temperature protection of
compressor discharge
Compressor discharge temperature
T5>108
℃ for 9s, compressor stops.
10.3.3 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
10.3.4 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.
10.3.5 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.
10.3.6 Compressor preheating
functions
Preheating permitting condition:
When T4(outdoor ambient temperature)
＜
3°C, the preheating function will be
activated.
10.3.7 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
10.3.8 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