Hitachi America, Ltd. RCU SERIES
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5.3 Fault Codes
When RCU fault occurs, the Fault LED on the keypad will be lit. According to the fault states,
fault code is displayed such as below. When Fault occurs, Reset should be performed by DI5.
Occurs after 100% for 100sec, 150% for 30sec
Occurs at approx, 200% of the current on power side (Protected by Software)
Threshold at approx, 800 VDC
Protected by thermistor at overheat condition(95℃)
Detects over current and protects RCU by hardware
External Emergency
Input Signal
Fault generated by external input signal
The RCU detects no, or under voltage at the AC line terminals
Phase Imbalance
Protection
Imbalance between phases (R, S, T) exceeds 2%.
Table 5.1 Fault code / Fault Description
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Call 1(800)985-6929 for Sales
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