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9.3 Protection
9.3.1 Models 263-353 XR
9.3.1.1 Three Minutes Delay at restart for compressor.
9.3.1.2 Temperature protection of compressor top.
9.3.1.3 If the temperature of compressor top is too high (higher than 120
℃
) and the Over-load Protector is cut, the
units stop. When the Over-load Protector restore and close (lower than 105
℃
), the compressor will restart (in this
case the compressor is restricted by Three Minutes Delay protection.
9.3.1.4 Inverter module Protection, Inverter module Protection itself has a protection function against current,
voltage and temperature. If these protections happened, the corresponding code will display on indoor unit LED.
9.3.1.5 Sensor protection at open circuit and breaking disconnection
9.3.1.6 Fan Speed is out of control. When Indoor Fan Speed is too low (lower than 300RPM for 60 seconds), the unit
stops and LED displays failure information and can’t return
to normal operation automatically.
9.3.1.7 Cross Zero signal error warning. If there are 20 alternations of Cross Zero signals are incorrect, the unit
stops and LED displays failure information. After resuming, the motor rotates again. The spacing of Cross Zero signal
is 6-13ms.
9.3.1.8 Indoor fan delayed open function
9.3.1.9 For all modes, when the units are turned on, the indoor fan can operate 10 seconds after the action of louver.
9.3.1.10 Compressor preheating function.
Preheating permitting condition:
If T4(outdoor ambient temperature)
＜
3
℃
and the machine connects to power supply newly or if T4
＜
3
℃
and compressor has stopped for over 3 hours, the compressor heating cable will work.
Preheating mode:
A weak current flows through the coil of compressor from the wiring terminal of compressor, then the
compressor is heated without operation.
Preheating release condition:
If T4
＞
5
℃
or user turns on the machine and compressor runs, preheating function will stop.