Fujitsu Airstage V-II Service Manual page 37

Protective Function
Detect Parts
High Pressure High Pressure
Protection Stop 1 Sensor
High Pressure Pressure Switch
Protection Stop 2
Low Pressure Low Pressure
Protection 1 Sensor
Low Pressure
Low Pressure
Sensor
Protection 2
Low Pressure Low Pressure
Sensor
Protection 3
Low Pressure Low Pressure
Protection 4 Sensor
Abnormal Low
Low Pressure
Pressure Protection
Sensor
Control
Low Pressure Low Pressure
Protection Stop Sensor
Compressor Temp Compressor
Protection Stop Temp
Thermistor
DISPLAY
COOL HEAT
P2
<Pattern
High-pressure
<Pattern
5 minutes have elapsed and high-pressure
EA41
<Pattern
Pattern
<Pattern
10 minutes have elapsed and high-pressure
P2
<Pattern
Pressure SW operated (Operated by high-pressure
<Pattern
5 minutes have elapsed and pressure SW operation reset
(Reset by high-pressure
EA42
<Pattern
Pattern
(INV)
<Pattern
EA43
10 minutes have elapsed and pressure SW operation reset
(CONST)
(Reset by high-pressure
<Starting conditions>
Low-pressure
<Reset conditions>
5 minutes have elapsed and low-pressure
<Starting conditions>
Low-pressure
<Reset conditions>
3 minutes have elapsed and low-pressure
<Starting conditions>
One operating outdoor unit and INV compressor operating at 30rps and
low-pressure
<Reset conditions>
5 minutes have elapsed and INV compressor operating at 40rps or faster
<Starting conditions>
3 minutes have elapsed and low-pressure
<Reset conditions>
3 minutes have elapsed and low-pressure
<starting condition>
Low-pressure
P3
<Pattern
Low-pressure
<Pattern
3 minutes have elapsed and low-pressure
EA51
<Pattern
Pattern
<Pattern
Error reset (push button SW) executed after power turned on again.
P4
<Pattern
Compressor temperature
<Pattern
3 minutes have elapsed and discharge temperature
EA31
<Pattern
Pattern
(INV)
EA32 <Pattern
Error reset (push button SW) executed after power turned on again
(CONST)
Operating Condition
starting condition>
4.00MPa
reset condition>
3.50MPa
starting condition>
generated 3 times within 60 minutes.
reset condition>
3.50MPa
starting condition>
reset condition>
3.2MPa)
starting condition>
generated 3 times within 60 minutes.
reset condition>
3.2MPa)
0.20MPa
0.30MPa
0.10MPa
0.17MPa
0.65MPa
0.18MPa
0.22MPa
<reset condition>
3 minutes have elapsed and
0.16MPa
low-pressure
starting condition>
0.05MPa or low-pressure 0.10MPa continues for 10 mins
reset condition>
0.17MPa
starting condition>
generated 5 times within 180 minutes.
reset condition>
starting condition>
fixed value (INV: 112°C, Constant speed: 120°C)
reset condition>
starting condition>
generated 2 times within 40 minutes
reset condition>
02-14
All compressors in outdoor unit stopped
All compressors in outdoor unit stopped
Error display
Corresponding compressor stopped
4.20MPa)
Corresponding compressor stopped
Error display
SV1 ON
SV1 ON
SV1 ON
EEV of stopped indoor unit opened quickly
(450pls)
Compressor capacity lowered every 180 secs,
when the Low-pressure becomes more than
0.18MPa 0.17MPa, prohibit compressor capacity rise.
All compressors in outdoor unit stopped
All compressors in outdoor unit stopped
(permanent stop)
Error display
Corresponding compressor stopped
80°C
Corresponding compressor stopped
(permanent stop)
Error display
Operation