Fault Symptoms / Troubleshooting; Table 2-2 Fuses - Cal Power TrueWave TW5250 Service Manual

SERVICE MANUAL

2.5 FAULT SYMPTOMS / TROUBLESHOOTING

The troubleshooting approach taken in this section will be at the assembly or module
level. That is, a fault symptom will be described followed by a suggestive course of
action in which to take. That course of action will often include the swapping out of an
assembly or module in order to isolate and resolve the failure. Once again, due to the
complexity of the assemblies and modules within the TW system and the fact that
specialized test stations are required for troubleshooting, field repair of failed
assemblies and modules is not feasible.
Although it is virtually impossible to identify every possible fault scenario, the following
are some of the more probable failure modes of a TW system. Since the TW is such a
complex system, any fault could be caused by one or more of several assemblies. For
that reason, this manual will list the suspect assemblies in order with the first assembly
listed being the most likely cause of the fault. Along with the suspect assemblies listed,
the cables connecting those assemblies are also suspect and must be inspected and
replaced if necessary, especially if replacing the assemblies does not resolve the
failure. This is a very important consideration, and should not be overlooked since
failures can indeed be caused by defective cables or connections.
For reference, fuses are identified in Table 2-2. See TW Operation Manual for model
specific information.
Name
INPUT FUSE
INPUT FUSE
INPUT FUSE
MAINTENANCE AND TROUBLESHOOTING
Type
600V 20A SLOW BLOW
480V 40A SLOW BLOW
480V 50A SLOW BLOW
TABLE 2-2. FUSES
Manufacturer and Part Number
GOULD SHAWMUT - ATDR20
LITTELFUSE – CCMR20
BUSSMANN – SC40
LITTELFUSE – SLC40
BUSSMANN – SC50
LITTELFUSE – SLC50
2-3