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9.3 Main Protection
9.3.1 Compressor three-minute delay at
restart
Compressor functions are delayed for up to ten
seconds upon the first startup of the unit, and are
delayed for up
to three minutes upon subsequent unit restarts.
9.3.2 Automatic shutoff based on discharge
temperature
If the compressor discharge temperature exceeds
108°C for nine seconds, the compressor ceases
operation.
9.3.3 Automatic shutoff based on fan speed
If the indoor fan speed registers below 300RPM
or over 1500RPM for an extended period of time,
the unit ceases operation.
9.3.4 Inverter module protection
The inverter module has an automatic shutoff
mechanism based on the unit’s current, voltage,
and temperature. If automatic shutoff is initiated,
the corresponding error code is displayed on the
indoor unit and the unit ceases operation.
9.3.5 Indoor fan delayed operation
When the unit starts, the louver is automatically
activated and the indoor fan will operate after
a period of setting time or the louver is in place .
If the unit is in heating mode, the indoor fan is
regulated by the anti-cold wind function.
9.3.6 Compressor preheating
Preheating is automatically activated when T4
sensor is lower than setting temperature..
9.3.7 Sensor redundancy and automatic
shutoff
If one temperature sensor malfunctions, the air
conditioner continues operation and displays the
corresponding error code, allowing for emergency
use.
When more than one temperature sensor is
malfunctioning, the air conditioner ceases
operation.
9.3.8
Refrigerant leakage detection
This function is active only when mode is
selected. It will detect if the compressor is being
damaged by refrigerant leakage or by
compressor overload. This is measured using
the coil temperature of evaporator T2 when the
compressor is in operation.
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