SECTION 7: FAULT DIAGNOSIS AND REPAIR
GENERAL
1The units are designed for maximum reliability, therefore faults during normal use are unlikely. If faulty operation does occur, the source of the failure can usually be readily determined by inspection of the LED on the LVD PCA and the status of the contactor.
WARNINGS
(1)EXERCISE EXTREME CAUTION WHEN WORKING OR MAKING MEASUREMENTS WITHIN THE UNITS. HIGH VALUE DC VOLTAGES MAY PRESENT A HAZARD OWING TO THE DANGER OF SHORT CIRCUITS. RINGS, WATCHES AND JEWELLERY SHOULD BE REMOVED AND ONLY INSULATED TOOLS SHOULD BE USED. A SOLDERING IRON SHOULD NOT BE USED UNLESS THE INPUT AND OUTPUT HAVE FIRST BEEN ISOLATED.
(2)THESE UNITS USE POSITIVE EARTH. CAREFULLY OBSERVE CORRECT POLARITY WHEN CONNECTING THE UNITS.
(3)REFER TO MANUAL HANDLING, SECTION 8, BEFORE ATTEMPTING TO MOVE OR LIFT THE UNITS. MAINTENANCE SPARES
2It is recommended that a set of maintenance spares is held by the maintenance engineer, as detailed below:
CIRCUIT |
| APC | BS PART | RECOMMENDED |
CODE | DESCRIPTION | NUMBER | NUMBER | QUANTITY |
BC1 | Contactor | 503770 | 1 | |
FS1 | Fuse, 600A (15000218) | 503772 | 1 | |
| Fuse, 300A (15000248) | 503773 | 1 | |
| Fuse, 1000A (15000264) | 503802 | 1 | |
| Fuse, 400A (15000408) | 505300 | 1 | |
| Fuse, 500A (15000409) | 505301 | 1 | |
FS2 | Fuse, 2A | 502739 | 1 | |
- | LVD PCA | 0P9445 | 524792 | 1 |
FIELD REPLACEABLE UNITS
3In addition to the maintenance spares, the following components may be replaced on site should they become faulty:
CIRCUIT |
| APC | BS PART | RECOMMENDED |
CODE | DESCRIPTION | NUMBER | NUMBER | QUANTITY |
FS1 | Fuse, 600A (15000218) | 503772 | 1 | |
| Fuse, 300A (15000248) | 503773 | 1 | |
| Fuse, 1000A (15000264) | 503802 | 1 | |
| Fuse, 400A (15000408) | 505300 | 1 | |
| Fuse, 500A (15000409) | 505301 | 1 | |
FS2 | Fuse, 2A | 502739 | 1 |
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