Gree GWH18MC-K3DNA2G Service Manual page 35

4. Reducing frequency at high speed and stop machine:
If [T
Cooling overload frequency reducing temperature at high speed
by reducing 30Hz/90s till the lower limit; After it was running 90s at the lower limit, if [T
, then Cooling overload protects machine stopping;
outer pipe]
5. Power turn-off:
If the [T
Cooling overload power turn-off temperature
]and the compressor has been stopped working for 3 minutes, the machine should be allowed to operate.
limited temperature
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 t overload 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 can not 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 T inner pipe T heating overload frequency-limited temperature (the temperature of
hysteresis is 2 ), 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.
1. Frequency limited
If [T
heating overload frequency-limited temperature
compressor.
2. Reducing frequency at normal speed and stopping machine:
If T[
heating overload frequency reducing temperature at normal speed
compressor frequency by reducing 8Hz/90s till the lower limit; After it was running 90s at the lower limit, if T heating overload frequency
reducing temperature at normal speed ≤T inner pipe, then overload protects machine stopping;
3. Reducing frequency at high speed and power turn-off:
If [T
heating overload frequency reducing temperature at high speed
by reducing 30Hz/90s till the lower limit; After it was running 90s at the lower limit, if T heating overload frequency reducing temperature
at normal speed ≤T outer pipe, then Cooling overload protects machine stopping;
4. Power turn-off:
If the [T
heating overload power turn-off temperature
limited temperature and the compressor has been stopped working for 3 minutes, the machine should be allowed to operate.
5. If the 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 t
overload 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 can not be resumed, transferring
mode will not clear it). Protective function for discharge temperature of compressor
1. Starting estimation:
After the compressor stopped working for 180s, if T
is allowed to start, otherwise it should not be started, and should be stopped to treat according to the discharge temperature:
The machine should be stopped or transferred to supply air, the trouble should be cleared immediately, and the protection times are not
counted.
2. Frequency limited
If [T
Limited frequency temperature during discharging
of compressor.
3. Reducing frequency at normal speed and stopping machine:
If [T
frequency reducing temperature at normal speed during discharging
compressor frequency by reducing 8Hz/90s till the lower limit; After it was running 90s at the lower limit, if [T
] ≤T
speed during discharging Discharge
32
]≤T
outer pipe
] ≤T , then Cooling overload protects machine stopping; If [T
outer pipe
]≤T <[T
inner pipe heating overload frequency reducing temperature at normal speed
]≤T
inner pipe
]≤T
inner pipe
] ≤T , then overload protects machine stopping; If T inner pipe T heating overload frequency-
inner pipe
Discharge
] ≤T <[T
Discharge frequency reducing temperature at normal speed during discharging
] ≤T
, you should discharge to protect machine stopping;
[T
Cooling overload power turn-off temperature
<[T
heating overload frequency reducing temperature at high speed
<[T
heating overload power turn-off temperature
<T
Discharge limited temperature
<[T
Discharge frequency reducing temperature at high speed during discharging
], you should adjust the compressor frequency
Cooling overload frequency reducing temperature at normal speed
outer pipe
] , you should limit the frequency raising of
], you should adjust the
], you should adjust the compressor frequency
(the temperature of hysteresis is 2ºC ), the machine
] , you should limit the frequency raising
frequency reducing temperature at normal
Service Manual
] ≤[T
]<[T
Cooling overload frequency-
], you should adjust the
Technical Information