1-92
TROUBLESHOOTING
■ 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 Activating Condition Remarks
P01
Compression Ratio>
9 => Frequency Decrease
(Pd/(Ps+1.3))<
2.2 => Frequency Increase
Ps: Suction Pressure of
Compressor
P02 Pd>
2.4MPa => Frequency Decrease
Pd: Discharge Pressure of
Compressor
P03
Inverter Output Current>
25A (220V),
14A (380, 415V) => Frequency Decrease
-
P04
Inverter Fin Temperature>
94
o
C
=> Frequency Decrease
-
P05
Temperature at the top of compressor is high
=> Frequency Increase
(Maximum temperature is different
depending on the frequency.)
-
P06
Low-Pressure is Excessively Low
=> Frequency Increase
(Minimum pressure is different
depending on the ambient temperature.)
-
For
16, 20HP
When Switching
∆P<0.5MPa => Frequency Increase
∆P>1.3MPa => Frequency Decrease
For
24, 30HP
When Switching
∆P<1.0MPa => Frequency Increase
∆P>2.1MPa => Frequency Decrease
For
5 to 20HP
Frequency less than 40Hz is maintained for
more than 1 hour. => Frequency>
40Hz
For
24, 30HP
Frequency less than 120Hz at cooling
(150Hz at heating) is maintained for more
than 1 hour => Frequency>
120Hz at cooling
(150Hz at heating)
P09
Pd<
0.69MPa => Frequency Increase
(When Cooling Operation)
Pd<
1.57MPa => Frequency Increase
(When Heating Operation)
Pd: Discharge Pressure of
Compressor
P0A
Running Current for Comp.>
Setting Value
=> Frequency Decrease
Setting Value:
Upper limit of total running
current is set 80%, 70% and
60% at normal operation
using input on PCB.
P11 Compression Ratio (Pd/(Ps+1.3)<1.8)
When activating 3 times in an
hour, "43" alarm is indicated.
P12 Ps>0.9MPa
When activating 3 times in an
hour, "44" alarm is indicated.
For
5 to 20HP
Ps>2.7MPa
(In case of 20 to 30Hz: Pd>2.5MPa)
For
24, 30HP
Ps>2.7MPa
P14
Current>
Maximum Value(*1),
or Current<0.9A
When activating 3 times in an
hour, "39" alarm is indicated.
P15
In Case of
Ps>0.02MPa over 12 minutes,
Discharge Gas Temperature>
132
o
C over
10 minutes
or Discharge Gas Temperature>
140
o
C over
5 seconds
When activating 3 times in
30 minutes, "47"(Ps) or "08"
(Discharge Gas) alarm is
indicated.
For
5 to 20HP
Discharge Gas SUPERHEAT less than
10 deg. is maintained for an hour.
For
24, 30HP
Discharge Gas SUPERHEAT less than
10 deg. is maintained for 30 minutes.
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
Insufficient/Excessive Voltage at Inverter
Circuit or CB Connector Part
When activating 3 times in
30 minutes, "06" alarm is
indicated.
P13
∆P = Pd - Ps
-
P16
4-Way Valve
Switching
Control
Discharge
Gas
SUPERHEAT
Decrease
Retry
When activating 3 times in an
hour, "45" alarm is indicated.
When activating 2 times in
2 hours (90min. For 24, 30HP),
"07" alarm is indicated.
Protection Control
P07
P08
Vacuum/Discharge Gas
Temperature
Increase Retry
Pressure Ratio
Control
High-Pressure
Increase Protection
Current Protection
Inverter Fin Temperature
Increase Protection
Discharge Gas
Temperature Increase
Protection
Low-Pressure
Decrease Protection
Insufficient Voltage
/Excessive Voltage
Retry
Oil Return
Control
Running Current Limit
Control
(For 24, 30HP)
Pressure Ratio
Decrease Retry
Low-Pressure
Increase Retry
Overcurrent Retry of
Constant Compressor
High-Pressure
Increase
Retry
High-Pressure
Decrease Protection
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