电机开启就跳闸的原因：
1、保护开关的容量太小。
2、电动机短路。
3、电动机过载，或卡死。首先检查电动机绝缘是否正常，用500V摇表（兆欧表）检查电动机绕组，0.5兆欧及以上为合格；电机没有问题，低于0.5兆欧大于0.2兆欧，绝缘不合格，但还不至于漏电；小于0.2兆欧不为零，电机已经短路或有漏电，需要继续检查找到原因；绝缘为零说明电机已经接地或短路，需要继续检查找到原因。
如果没有摇表，接一根火线进电机线圈，用电笔测量外壳，和火线一样亮说明电机已经接地或短路，需要继续检查找到原因；用电笔测量外壳，虽然没有火线亮，但有明显亮度，说明电机有漏电，绝缘不合格，需要继续检查找到原因；用电笔测量外壳，不亮或只有微弱亮，说明电机绝缘没有问题。
如果电机绝缘合格，可能是电源有缺相、电源电压不平衡（相差太大）、电机或电机线有断线、接触不良等问题，需要一一排查解决。
PART # DESCRIPTION QTY
1 100179 MODULE, FISHER CONT 100179 FLYBACK MULTIPLEXER ASSY INTECOLOR 100179 1
2 17A6821X012 CIRCUIT BOARD, FISHER 17A6821X012 INTERFACE PSI HP 6
3 18A0046X012 MODULE, FISHER 18A0046X012 6703 MEMORY EXPANSION 1
4 49A2724X022 CIRCUIT BOARD, FISHER 49A2724X022 PROVOX KEY CONTROL 1
5 CL7001A1 CIRCUIT BOARD, FISHER CL7001A1 CONFIGURABLE CONTROLLER W/O DISCRETE I/O 23
6 CL7016SPR-INTC2 CIRCUIT BOARD, FISHER CL7016SPR-INTC2 INTERCONNECT ASSY 1
7 DC6531EA1R CIRCUIT BOARD, FISHER CONT DC6531EA1R PR PRINTER LOGIC B7 2
8 DC6531FA1 CIRCUIT BOARD, FISHER CONT DC6531FA1 PRINTER SERIAL INTEFACE 2
9 DC6531HA1 CIRCUIT BOARD, FISHER CONT DC6531HA1 PRINTER POWER SUPPLY 3
10 DC6531JA1 CIRCUIT BOARD, FISHER CONT DC6531JA1 PRINTER RIBBON CONTROL 3
11 FSDC6301FA1 CIRCUIT BOARD, FISHER CONT FSDC6301FA1 VDU REFRESHER MEMORY 2
12 FSDC6501FA2 CIRCUIT BOARD, FISHER CONT FSDC6501FA2 VDV DISPLAY GENERATOR 3
13 FSDH6551KB1 CIRCUIT BOARD, FISHER CONT FSDH6551KB1 MPU/ROM PWB 1
14 FSDM6321B2 CIRCUIT BOARD, FISHER CONT FSDM6321B2 TERMINATION ANALOG CURRENT INPUT STYLE C 14
15 FSDM6331 CIRCUIT BOARD, FISHER CONT FSDM6331TERMINATION STANDARD STYLE A 32
16 FSDM6363 CIRCUIT BOARD, FISHER CONT FSDM6363 TERMINATION DISCRETE INPUT STYLE E 120V 9
17 FSDM6371A2 CIRCUIT BOARD, FISHER CONT FSDM6371A2 PULSE COUNT INPUT 3
18 17A5632X012 CARD, GENERATOR, TIME BASE, HP, FISHER PART 17A5632X012. FOR FISHER PROVOX 1
19 30B7248X022 MPU ROM 3
20 30B8625X01R V10 RAM INTERFACE PWB 1
21 31B0955X08R MPU ROM 1
22 31B6459X012 COMPUTING CONTROLLER 1
23 36A3885X022 MODULE, TERMIN FISHER CONT 36A3885X022 ANALOG CURRENT INPUT SGL ENDED 4-20 MA 3
24 37A8986X01R ISO RS232 I/O 1
25 39A5379X042 FISHER PROVOX CARD, REDUNDANT MANUAL CARD, FISHER P/N 39A5379X042 2
26 39A8571X032 SIU COMMON 1
27 46A281X01R PWR CONVERSION ASSY 1
28 46A4233X01R POWER SUPPLY 1
29 BA 350-SA DEC DISK SYSTEM 1
30 CD6201 FISHER LOOP CONTROLLER 29
31 CL6003X1-A3 IAC MEMORY MODULE 2
32 CL6601X1-HA5 I/O DRIVER 14
33 CL6611X1-FC10 MPU 12
34 CL6611X1-FC8 MPU 2
35 CL7001 CONFIG CONTROLLER 11
36 CL7001-A5 CONFIG CONTROLLER 1
37 CL7001X1-A1 CONFIG CONTROLLER 1
38 CL7001X1-A10 CONFIG CONTROLLER 1
39 CL7001X1-A2 CONFIG CONTROLLER 1
40 CL7001X1-A5 CONFIG CONTROLLER 4
41 CL7001X1-A6 CONFIG CONTROLLER 3
42 CL7001X1-AG CONFIG CONTROLLER 2
43 CL7002 PC BOARD 4
44 CL7002-A1 COMPUTING PWB 1
45 CL7002X1-A2 COMPUTING PWB 1
46 CL7004X1-A1 IAC DIO MODULE 1
47 CL7005X1-A1 IAC PIO MODULE 3
48 CL7011X1-A2 COMPUTING CONTROLLER 4
49 CL7011X1-A5 COMPUTING CONTROLLER 3
50 CL7014-A1 IAC DIO MODULE 1
51 CL7652X1-A1 DUAL CIA 10
52 CL7652X1-A2 DUAL CIA 4
53 CP7202 PWR CONVERSION ASSY 4
54 CP7202X1-A1 PWR CONVERSION ASSY 3
55 CP7202X1-A1-67 PWR CONVERSION ASSY 1
56 CP7222X1-A1 PWR CONVERSION ASSY 1
57 DC6301X1-EA7 KEYBOARD P.S. 1
58 DC6400-?? KEYBOARD 1
59 DC6400-EA6 KEYBOARD 1
60 DC6400-FC3 KEYBOARD P/BTN LOGIC 1
61 DC6400-FC4 KEYBOARD P/BTN LOGIC 1
62 DC6400X1-EA35 KEYBOARD 2
63 DC6400X1-FC4 KEYBOARD P/BTN LOGIC 1
64 DC6400X1-FC5 KEYBOARD P/BTN LOGIC 1
65 DC6431X1-CC1 PROVOX KEYBOARD 1
66 DC6460 RT VAX 2
67 DC6460X-WA5 RT VAX 1
68 DC6481X1 PROVOX PRINTER 1
69 DC6481X1-A1 PROVOX PRINTER 1
70 DC6486 PRINT SPOOLER 1
71 DC6501X1-EA6 Keyboard cont PWB Assy 5
72 DH6011-X1 I/O CARD DCU I/O DH6011 2
