04-11
< Heating mode >
< Common >
Protective Function
Detect Parts
Operating Condition
Operation
Discharge Temp
Protection 2
Discharge Temp
Thermistor
EEV2 increases 30Pulse/30sec.
Start: DISTH 107
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Release: DISTH 100
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Discharge Temp
Protection Stop
Discharge Temp
Thermistor
Release: 3 minutes have passed, and DISTH 80
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The compressor stops.
(more than 3 minutes)
Start: DISTH 120
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Start: The operation repeats 3 times within 40 minutes.
Release: Reset the outdoor unit.
The compressor stops.
(Permanent stop)
Error indication : refer to 06-20 26
High Pressure
Protection Stop
High Pressure
Sensor
Start: HPS 4.1MPa
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Release: 3 minutes have passed, and HPS<3.5MPa.
All the compressors of the
outdoor unit stop.
(more than 3 minutes)
Start: The operation repeats 3 times in an hour.
Release: 10 minutes have passed, and HPS<3.5MPa.
All the compressors of the
outdoor unit stop.
(more than 10 minutes)
HPS : High pressure sensor value
Error indication : refer to 06-26
High pressure
protection control
(Only on heating mode)
High Pressure
Sensor
Function/Release judgment is done in every 2 minutes with the
discharge pressure sensor detection value on heating operation
mode.
- Function : HPS 3.54MPa
- Release HPS < 3.30MPa
Note) It functions if it exceeded 3.80MPa within 20seconds
even it did not pass 2 minutes.
Master unit : Outdoor fan speed
is reduced in every 1 step
If the high pressure still
does not decrease,
SV1 is opened.
Slave unit : SV1 is opened.
(Stop : LPS 0.1Mpa 2min at TEST RUN)
Start: The operation repeats 5 times in 3 hours.
Release: Reset the outdoor unit.
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Low Pressure
Protection Stop
Abnormal low
pressure protection
control
(Only on heating mode)
Low Pressure
Sensor
Low pressure
saturation temperature
(calculated from
suction pressure
sensor value)
Release: 3 minutes have passed, and LPS 0.2MPa.
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Start: LPS 0.1MPa and 10 minutes have passed.
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All the compressors of the
outdoor unit stop.
(more than 3 minutes)
All the compressors of the
outdoor unit stop.
permanent stop
Error indication : refer to 06-27
Prot
ect
ive Funct
ion
Detect Part
s
Op
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Op
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- If the low pressure saturation temperature continues below -30.9degC for 2 minutes or more, the capacity
increase of the compressor is prohibited.
- If the low pressure saturation temperature further keeps the condition lower than the setting value for 1 minute,
the compressor capacity is reduced.
- It is released when the low pressure saturation temperature becomes higher than -24.1degC and continues for
25 seconds.
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Overcurrent Break
Stop
Overcurrent
Protection Circuit
- Inverter compressor is stopped when the over current protection circuit
in the inverter PC Board detects an abnormal current during the
operation.
If it repeated 5 times, the inverter compressor becomes permanent
stop.
- Inverter compressor is stopped when the over current protection circuit
in the inverter PC Board detects an abnormal current at the time of
start up.
Inverter compressor becomes permanent stop if it repeated over the
number of set time.
Release : condition is to reset the power.
Release: 120 minutes have passed. Or 5 minutes have passed,
operation capacity rate 70%
Release: Detected current < Limit value - 0.5A
The DC inverter scroll
compressor stops.
Error indication : refer to 6-46, 47
Frequency Maximum
Setting Protection
Current Detector
Circuit
Start: Detected current Limit value
(Vary with the outdoor air temperature)
The DC inverter scroll compressor
operates on limit frequency.
Until conditions are met
for a release.
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Heatsink Temp
Protection Stop
Heatsink Temp
Detector Circuit
If Abnormal heatsink temp occurred 3 times in 60 minutes,
restart of the DC inverter scroll compressor is restricted.
Start: Abnormal heatsink temp occurred.
The DC inverter scroll
compressor stops.
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