Installation and Maintenance
Service Manual
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 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:
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.
(6) Voltage sag protection
After start the compressor, if the time of DC link Voltage sag [U
Sagging
protection voltage
] is measured
to be less than t Voltage sag protection
time
,
the
machine
should
be
stop
at
once,
hand
on
the
voltage
sag trouble, reboot automatically after 30 minutes.
(7) Communication fault
When
you
have
not
received
any
correct
signal
from
the
inner
machine in three minutes, the machine will stop for communication
fault. When you have not received any correct signal from driver
IC (aim to the controller for the separating of main control IC and
driver
IC),
and
the
machine
will
stop
for
communication
fault.
If
the
communication
is
resumed,
the
machine
will
be
allowed
to
operate.
(8) Module protection
Testing
the
module
protective
signal
immediately
after
started,
once the module protective signal is measured, stop the machine
with
module
protection
immediately.
If
the
module
protection
is
resumed,
the
machine
will
be
allowed
to
operate.
If
the
module
protection
continuously
occurs
for
three
times,
it
should
not
be
resumed automatically, and you should press the ON/OFF button
to resume. If the running time of compressor exceeds the [t
Protection
times clearing of module
] , the module protection is cleared to recount.
(9) Module overheating protection
1. Starting estimation:
After
the
compressor
stopped
working
for
180s,
if
T
Module
<[T
Module
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
module
overheating
23
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