Hitachi FS3 Series, Руководство по обслуживанию

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1
TROUBLESHOOTING
75
n
ACTIVATING CONDITION OF PROTECTION CONTROL CODE
For following the conditions as the temperature change,
etc., the control of frequency, etc. is performed to prevent
the abnormal conditions by the protection control. The activating conditions of protection control are shown in
the table below
Code Protection Control Activating Condition Remarks
P01 Pressure Ratio
Control
Compression Ratio
˜
9
“
Frequency Decrease
(Pd/(Ps+1.3))
ˆ
2.2
“
Frequency Increase
Ps: Suction Pressure of
Compressor
P02 High-Pressure
Rise Protection
Pd
˜
2.35MPa (23.5kgf/cm
2
G)
“
Frequency Decrease
Pd: Discharge Pressure of
Compressor
P03 Current Protection
Inverter Output Current
˜
14A
“
Frequency Decrease
-
P05 Discharge Gas
Temperature Rise
Protection Temperature at the top of compressor is high
“
Frequency Increase (Maximum temperature is
different depending on the frequency.)
-
P06 Low-Pressure Fall
Protection Low-Pressure Is Excessively Low
“
Frequency Increase (Minimum pressure is
different depending on the ambient temperature.)
-
P07 4-Way Valve
Switching Control
(For 16, 20HP) When Switching,
D
P<0.5MPa (5kgf/cm
2
G)
“
Frequency Increase
D
P<1.3MPa (13kgf/cm
2
G)
“
Frequency Decrease
D
P=Pd-Ps
P08 Oil Return Control Frequency less than 40Hz is maintained for more than
1 hour
“
Frequency
˜
40Hz
-
P09 High-Pressure Fall
Protection
Pd
ˆ
0.69MPa (7.0kgf/cm
2
G)
“
Frequency Increase (When Cooling Operation)
Pd
ˆ
1.52MPa (15.5kgf/cm
2
G)
“
Frequency Increase (When Heating Operation)
Pd: Discharge Pressure of
Compressor
P11 Pressure Ratio
Falling Retry Compression Ratio (Pd/(Ps+1.3)<1.8) When activating 3 times
in an hour, “43” alarm is
indicated.
P12 Low-Pressure
Rising Retry Ps>0.9MPa (9kgf/cm
2
G) When activating 3 times
in an hour, “44” alarm is
indicated.
P13 High-Pressure
Rising Retry Ps>2.7MPa (27kgf/cm
2
G)
(In case of 20 ~ 30Hz: Pd>2.5MPa (25kgf/cm
2
G))
When activating 3 times
in an hour, “45” alarm is
indicated.
P14 Overcurrent Retry of
Constant Compressor
Current
˜
Maximum Value(
v
1),
or Current<0.9A
When activating 3 times
in an hour, “39” alarm is
indicated.
P15 Vacuum/Discharge
Gas Temperature
Rising Retry In Case of
Ps>0.02MPa (0.2kgf/cm
2
G) over 12 minutes,
Discharge Gas Temperature
˜
132°C over 10 minutes
or Discharge Gas Temperature
˜
140 °C over
5 seconds
When activating 3 times in 30
minutes, “47”(Ps) or “08”
(Discharge Gas) alarm is
indicated.
P16 Discharge Gas
SUPERHEAT
Falling Retry Discharge Gas SUPERHEAT less than 10 deg. is
maintained for an hour. When activating 2 times
in 2 hours, “07” alarm is
indicated.
P17 Inverter Trip Retry Automatic Stoppage of Transistor Module,
Activation of Electronic Thermal
or Abnormal Current Sensor When activating 3 times
in 30 minutes, “51”, “52” and
“53” alarm is indicated.
P18 Voltage Falling /
Excessive Voltage
Retry Insufficient/Excessive Voltage at Inverter Circuit
or CB Condenser Part When activating 3 times
in 30 minutes, “06” alarm is
indicated.
Note: The maximum value (
v
1) is as follows:
Model 380-415V, 50 Hz
8 HP 12.1 A
10 HP 15.0 A
16 HP 17.8 A
20 HP 17.8 A
1. During protection control (except during alarm
stoppage), the protection control code is indicated.
2. The protection control code is indicated during
protection control and turns off when canceling the
protection control.
3. After retry control, the condition of monitoring is
continued for 30 minutes.