-
106
-
'11 • PAC-T-160
7) Over-current protection current safe controls I, II
Detecting the outdoor unit inverter input (primary) current and the output (secondary) current, if the current values exceed
setting values, the compressor speed (frequency) is controlled to protect the inverter.
Retention
Reduces frequency
at each minute.
Reset
B
A
Current (A)
[Fig.A]
Control v
alue
A (A
)
23
36
39
17
Tho
㧙
A(°C) : Outdoor air temperature
8) Power transistor temperature protection
a)
Protective control
If the power transistor temperature (detected with TIP) exceeds the setting value, the compressor speed (frequency)
is controlled to suppress the rise of power transistor temperature.
Retention
Reduces compressor frequency
at each minute.
Reset
81
85
Power transistor temp. (°C)
b)
Anomalous stop control (model 200, 250 only)
i) If the power transistor temperature rises further, the protective switch in the power transistor operates to protect
the compressor and the power transistor.
ii) Under any of the following condition, E41 is displayed and it enters the anomalous stop mode.
➀
When the protective switch in the power transistor operates 5 times within 60 minutes and the compressor stops.
9) Anomalous power transistor current
a)
Prevents over-current on the inverter. If the current value in the power transistor exceeds the setting value, the
compressor stops.
b)
If the current value in the power transistor exceeds the specified value and the compressor stops 4 times within 30
minutes, E42 is displayed on the remote controller and it enters the anomalous stop mode.
10) Anomalous inverter PCB
If the power transistor detects any anomaly for 15 minutes, including the stop of compressor, E51 is displayed on the
remote controller and it enters the anomalous stop mode.
11) Anti-frost control by the compressor frequency control
a)
If the indoor unit heat exchanger temperature (detected with Th
I
-R) exceeds the setting value at 4 minutes after the
start of compressor, the compressor speed (frequency) is controlled to initiate the anti-frost control of indoor unit
heat exchanger.
b)
When there are 3 indoor unit heat exchanger temperatures (Th
I
-R), the lowest temperature is detected.
1.5
3.5
Retention
Reduces compressor frequency
at each minute.
Reset
Indoor unit heat exchanger temp. (°C)
c)
Regarding the anti-frost control by the operation stop, refer to the operation control function by the indoor unit
controller and the cooling, dehumidifying frost prevention of page 92
Model
Cooling
Heating
Control
value A
Reset
value B
Control
value A
Reset
value B
Primary
current
side
100
16
15
16
15
125,
140
23
22
23
22
200
27
26
27
26
250
33
32
33
32
Secandary
current
side
100
125,
140
17
～
23
(Fig.A)
16
～
22
23 (Fig.A)
22
200
Not implemented
250
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