Hitachi elevator NPX fault code analysis - Database & Sql Blog Articles

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Crystal oscillator

Photocoupler

Main B95 (NPX) Sub B95 (NPX)
10 Input interface voltage is abnormal
11 Cabin I/O transmission is abnormal
12 corresponding computer failure 12 corresponding computer failure
13 parallel communication failure 13 parallel communication failure
14 Parallel input buffer signal error 14 Parallel input buffer signal is abnormal
15 P48V power supply is abnormal (under one phase) 15 Control power supply is abnormal (inhibition circuit OFF fault)
17 elevator number error
20 #50B ON Fault 20 #50B ON Fault
22 #10T ON Fault 22 #15B ON Fault
23 Operation mode input signal error 23 Specification table error
24 Safety device action 24 Suppress circuit abnormality (suppression circuit ON fault)
25 Software WDT Action 25 Software WDT Action
26 three consecutive doors do not open
27 repeated faults appear
31 Slow speed detection (motor speed) 31 Slow speed detection (motor speed)
32 Rotary Encoder RE Fault (1) 32 Rotary Encoder RE Fault (1)
33 Rotary Encoder RE Fault (2) 33 Rotary Encoder RE Fault (2)
35 rotary encoder RE wiring error
37 reverse run checkout
38 communication error between the sub computer and the SH computer
39 The sub-computer and SH computer specifications are inconsistent
3A SH computer ROM love and (SUM) failure
40 Low voltage detection (check regenerative transistor IGBT7)
41 #40D #40G ON Fault
42 #50B OFF fault
44 #10T OFF Fault 44 #15B OFF Fault
46 speed command input buffer failure
48 low current detection
50 IPM crystal failure
51 BCS Action Test 51 Overvoltage Detection
53 BCS system abnormality (when BCS1 is attached) (when using B89 bulb)
54 SH computer stops main B95 (NPX) sub B95 (NPX)