79
Installation and Maintenance
Service Manual
running 90s at the lower limit, if [T
Cooling overload frequency reducing
temperature at normal speed
]≤T
outer pipe
, then Cooling overload protects
machine stopping;
4. Reducing frequency at high speed and stop machine:
If [T
Cooling overload frequency reducing temperature at high speed
]≤T
outer pipe
[T
Cooling
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
Cooling overload frequency reducing
temperature at normal speed
] ≤[T
outer pipe
], then Cooling overload protects
machine stopping;
5. Power turn-off:
If the [T
Cooling overload power turn-off temperature
]≤T
outer pipe
, then Cooling
overload protects machine stopping; If [T
outer pipe
]<[T
Cooling 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 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
]≤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:
A f t e r t h e c o m p r e s s o r s t o p p e d w o r k i n g f o r 180s , i f
T
Discharge
<T
Discharge limited temperature
(the temperature of hysteresis is
2ºC ), 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:
I f [ T
f r e q u e n c y r e d u c i n g t e m p e r a t u r e a t n o r m a l s p e e d d u r i n g d i s c h a r g i n g
]
≤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
