Hitachi L100 SERIES Service Manual page 15

(10) Over voltage at source (E 15)
Phenomena:
Cause:
Remedy:
Way to Reset:
(11) Over temperature (E 21)
Phenomena:
Cause:
Remedy:
Cause:
Remedy:
Way to Reset:
(12) PTC error (E 35)
Phenomena:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Way to Reset:
Explanation of the way to reset.
A : Make close the terminals between RS and P24 (CM1 only for Japanese version) on the I/O board, or
press "STOP/RESET" key of the operator.
High voltage at power source line. Frequency inverter cannot protect source
overvoltage. If it is too high, frequency inverter will be damaged.
Source voltage is too high.
Check the source voltage continously.
Insert AC reactor at source lines.
A
Temperature sensor which located close to IGBT inside ISPM shows a too high
temperature.
Ventilator blocked. (for models which has ventilator.)
Check ventilator
The frequency inverter does not get enough cooling air.
Check cabinet ventilation, air filters, and ventilation openings in the cabinet.
A
Resistance of motor thermistor is high. This error can occur when you select
"PTC" function.
Too much load of the motor.
Reduce the load, use bigger motor.
Motor thermistor is not connected while PTC function is selected.
Disable PTC function when it is not used.
Characteristics of the motor thermistor is not suitable. Frequency inverter gives
PTC error when the resistance value becomes more than 3k ohm +-10%.
Use motor which has suitable thermistor for the inverter.
Or change thermistor characteristics of the thermistor by debug mode.
A
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