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38 PB
OPERATION
9-24k Sequence of Operation
1. Frequency limited
If [T
heating overload frequency-limited temperature
]≤T
inner pipe
<[T
heating overload frequency reducing temperature at normal speed
] , you should limit the frequency raising of
compressor.
2. Reducing frequency at normal speed and stopping machine:
If T[
heating overload frequency reducing temperature at normal speed
]≤T
inner pipe
<[T
heating overload frequency reducing temperature at high speed
], you should adjust the 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
]≤T
inner pipe
<[T
heating 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 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
] ≤T
inner pipe
, then overload protects machine stopping; If T inner pipe T heating overload frequency-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
Discharge
<T
Discharge limited temperature
(the temperature of hysteresis is 35.6ºF ), the machine 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
] ≤T
Discharge
<[T
frequency reducing temperature at normal speed during discharging
] , you should limit the frequency raising of
compressor.
3. Reducing frequency at normal speed and stopping machine:
If [T
frequency reducing temperature at normal speed during discharging
] ≤T
Discharge
<[T
frequency reducing temperature at high speed during discharging
], you should adjust the compressor
frequency by reducing 8Hz/90s till the lower limit; After it was running 90s at the lower limit, if [T
frequency reducing temperature at normal speed during discharging
]
≤T
Discharge
, you should discharge to protect machine stopping;
4. Reducing frequency at high speed and power turn-off:
If [T
frequency reducing temperature at high speed during discharging
] ≤T
Discharge
<[T
Stop temperature during discharging
], you should adjust
the compressor frequency by reducing 30Hz/90s till the lower limit; After it was running 90s at the lower limit, if [T
frequency reducing temperature at normal
speed during discharging
] ≤T
Discharge
, you should discharge to protect machine stopping;
5. Power turn-off:
If the [T
Power turn-off temperature during discharging
] ≤T
Discharge
, you should discharge to protect machine stopping; If [T
Discharge
]<[T
Limited frequency temperature during
discharging
] and the compressor has been stopped for 3 minutes, the machine should be allowed to operate.
6. If the discharging temperature protection of compressor continuously occurs for six times, it should not be resumed automatically, and you
should press the ON/OFF button to resume. During the process of running, if the running time of compressor exceeds the t Protection times
clearing of discharge , the discharge protection is cleared to recount. Stopped or transferred to supply air mode will clear the trouble times
immediately (if the trouble can not be resumed, mode transferring also will not clear it).
7. Frequency limited
If [I
Limited frequency when overcurrent
] ≤I
AC Electric current
<[I
frequency reducing when overcurrent
], you should limit the frequency raising of compressor.
8. Reducing frequency:
If [I
Frequency reducing when overcurrent
] ≤[I
AC Electric current I Power turn-off when overcurrent
] , you should reduce the compressor frequency till the lower limit or exit
the frequency reducing condition;
9. Power turn-off:
If [I
Power turn-off machine when overcurrent
] ≤[I
AC Electric current
] , you should carry out the overcurrent stopping protection; If I
AC Electric current
<[T
Limited frequency when
overcurrent
] and the compressor has been stopped for 3 minutes, the machine should be allowed to operate.
10. If the overcurrent protection continuously occurs for six times, it should not be resumed automatically, and you should press the ON/OFF
button to resume. During the process of running, if the running time of compressor exceeds the [t
Protection times clearing of over current
] , the discharge
protection is cleared to recount.
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