Overload Protection Function - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

Product Introduction
Basic Functions - 18K & 24K 230 volt

(5) Overload protection function

Overload protection function at the mode of Cooling and dehumidifying
1. Starting estimation: After the compressor stopped working for 180s, if Touter pipe <[TCooling overload frequency-
limited temperature](the temperature of hysteresis is 35.6 °F), the machine is allowed to start, otherwise it should not
be started, and should be stopped to treat according to the overload protection: Clear the trouble at the mode of power
turn-off / heating, and the protection times are not counted.
2. Frequency limited If [TCooling overload frequency-limited temperature ≤Touter pipe <[TCooling overload
frequency reducing temperature at normal speed], you should limit the frequency raising of compressor.
3. Reducing frequency at normal speed and power turn-off:
If [TCooling overload frequency reducing temperature at high speed]≤Touter pipe<[TCooling overload power turn-
off temperature], you should adjust the compressor frequency by reducing 8Hz/90s till the lower limit; After it was
running 90s at the lower limit, if [TCooling overloadfrequency reducing temperature at normal speed]≤
Touter pipe, then Cooling overload protects machine stopping;
4. Reducing frequency at high speed and stop machine
If [TCooling overloadfrequency reducing temperature at high speed]≤Touter pipe<[TCooling overload power turn-
off temperature]you should adjust the compressor frequency by reducing 30Hz/90s till the lower limit; After it was
running 90s at the lower limit, if [TCooling overload frequency reducing temperature at normal speed]≤ Touter pipe,
then Cooling overload protects machine stopping;
5.Power turn-off
If the cTCooling overload power turn-off temperature]≤Touter pipe, then Cooling overload protects machine
stopping; If Touter pipe<
[TCooling overload frequency-limited temperature] and the compressor has been stopped working for 3 minutes, the
machine should be allowed to operate.
6. If the Cooling overload protection power turn-off continuously occurs for six times, it should not be resumed
automatically, and you should press the ON/OFF button to resume if the fault keeps on. During the process of
running, if the running time of compressor
exceeds the [toverload protection times zero clearing time], the times of overload protection power turn-off should
be cleared to recount. The mode of stopping the machine or transferring to supply air will clear the trouble times
immediately (if the trouble cannot be resumed,
transferring mode will not clear it).
Overload protection function at the mode of heating
Starting estimation
After the compressor stopped working for 180s, if Tinner pipe<[Theatingoverload frequency-limited temperature](the
temperature of hysteresis is 35.6 °F), the machine is allowed to start, otherwise it should not be started, and cshould be
stopped to treat according to the overload protection: Clear the trouble at the mode of power turn-off / heating, and
the protection times are not counted.
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