2-6 PROTECTIVE FUNCTION
02-13
2-6-1 Protective Function List
Protective Function
Detect Parts
Operating Condition
Operation
Discharge Temp
Protection 1
Discharge Temp
Thermistor
Discharge Temp
Protection 2
Discharge Temp
Thermistor
Discharge Temp
Protection 3
Discharge Temp
Thermistor
High Pressure
Protection 1
High Pressure
Sensor
High Pressure
Protection 4
High Pressure
Sensor
COOL HEAT
<Starting conditions>
3 minutes have elapsed since the start of operation and
(discharge temperature 100°C or suction SH 10°C accumulated time
30 minutes)
<Reset conditions>
Discharge temperature 95°C and suction 7°C
EEV of operating indoor unit gradually opened
<Starting conditions>
Cooling: Discharge temperature 95°C
Heating: Discharge temperature 102°C
<Reset conditions>
Discharge temperature 90°C
Discharge temperature 97°C
EEV2 + 30pls/30 secs
<Starting conditions>
Discharge temperature 107°C
<Reset conditions>
Discharge temperature 105°C
Outdoor unit rotation execution
* After rotation has been executed once;
it is executed every 15 minutes.
Discharge Temp
Protection 4
Discharge Temp
Thermistor
< starting condition>
Discharge temperature 105°C
<Pattern reset condition>
Discharge temperature 100°C
INV compressor speed -6rps every 30 secs
Speed rise prohibited,
when discharge temperature becomes lower
than 105 , prohibit the rotational speed rise
of the compressor.
Discharge Temp
Protection 5
Discharge Temp
Thermistor
<Starting conditions>
Discharge temperature 95°C and EEV1=500pls
<Reset conditions>
2 minutes have elapsed and
(discharge temperature 90°C or EEV1 400pls)
Expansion valve of stopped indoor unit gradually
opened
(upper limit 200pls)
Discharge Temp
Protection 6
Discharge Temp
Thermistor
<Starting conditions>
Discharge temperature 90°C
<Reset conditions>
Discharge temperature 90°C
EEV1: Forcefully OPEN
Discharge Temp
Protection Stop
Discharge Temp
Thermistor
<Pattern starting condition>
Discharge temperature fixed value (INV: 110°C, constant speed: 115°C)
<Pattern reset condition>
3 minutes have elapsed and discharge temperature 80°C
Corresponding compressor stopped
<Pattern starting condition>
Pattern generated 2 times within 40 minutes
<Pattern reset condition>
Error reset (push button SW) executed after power turned on again
Corresponding compressor stopped
(permanent stop)
Error display
<Starting conditions>
High-pressure 3.94MPa
<Reset conditions>
Fixed time has elapsed and high-pressure 3.70MPa
* Fixed time when SV1: ON 180 secs, when SV2: ON 30 secs
At INV independent operation: SV2 ON
At constant speed independent operation:
SV1 ON
High Pressure
Protection 2
High Pressure
Sensor
<Starting conditions>
High-pressure 3.60MPa
<Reset conditions>
3 minutes have elapsed and high-pressure 2.80MPa
At INV independent operation: SV2 ON
When still insufficient: SV1 ON + SV2 ON
At INV + constant speed operation, constant
speed independent operation: SV1 ON
High Pressure
Protection 3
High Pressure
Sensor
<Starting conditions>
Fixed time has elapsed and high-pressure 3.50MPa
(* Fixed time at start of operation: 10 secs, after operation execution: 20 secs)
<Reset conditions>
Operation (fan speed 1 step increase) complete
Fan speed 1 step increase
<Pattern starting condition>
High-pressure 3.30MPa
<Pattern starting condition>
High-pressure 3.50MPa
<Pattern reset condition>
High-pressure 3.3MPa
<Pattern reset condition>
High-pressure 3.5MPa
Fan speed lowered/every 30 secs
Fan lowest speed (300rpm) fixed
DISPLAY
P1
EA11
(INV)
EA21
(CONST)
High Pressure
Protection 5
High Pressure
Sensor
Abnormal High
Pressure Protection
Control
High Pressure
Sensor
<Starting conditions>
High-pressure 3.20MPa
Compressor capacity lowered/every 15 secs
<Pattern starting condition>
High-pressure 3.78MPa
<Pattern reset condition>
After 25 seconds have elapsed and high-pressure 3.70MPa
Compressor capacity rise prohibited
<Reset conditions>
High-pressure 3.20MPa
<Pattern starting condition>
High-pressure 3.90MPa
<Pattern reset condition>
After 25 seconds have elapsed and high-pressure 3.78MPa
Compressor capacity lowered every 30 secs
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