HT instruments FULLTEST3 - Manual (Page 78)

FULLTEST 3
EN - 77
Fuse replacement (fuse F1, F2)
The two fuses are general ones for the tester and protect internal circuitry in POWER, R PE and
DIELECTRIC measurements.
In case mains switch pilot lamp (5) does not illuminate after connecting the Machinery-Tester
FULLTEST 3 to mains outlet and switching on the mains switch and neither the LC-Display (24) shows
any indication, it is very likely mains fuse F1 (4) or F2 (3) or both to be blown.
To replace the fuse proceed as follows:
1) Open the fuse holder F1 (4) and F2 (3) by using an appropriate screwdriver.
2) Remove the defective fuse and replace it with a new one (T16A/250V, 5×20 mm).
3) Replace the fuse holder.
Fuse replacement (fuse F3 for LOOP, RA and RCD functions)
F3 (FF 12.5 A / 500 V, 6.3 × 32 mm) has blown if:
• Text FUSE F3 appears on the display in LOOP, R A or RCD function.
To replace the fuse proceed as follows:
1) Unlock corresponding fuse holder (2) by using an appropriate screwdriver
2) Remove the defective fuse and replace it with a new one (FF 12.5 A / 500 V, 6.3 × 32 mm).
3) Lock the fuse holder again.
Fuse replacement (fuse F4 for RPE function)
Fuse F4 (F20A/500V 6.3 x 32 mm) has blown if message FUSE F4 appears on the display in R PE
function.
To replace the fuse proceed as follows:
1) Unlock corresponding fuse holder F4 (15) by using an appropriate screwdriver
2) Remove the defective fuse and replace it with a new one.
3) Replace the fuse holder.
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If any fuse blows several times (for example in case of operating
error) the instrument must be sent in to the service department in
order to be checked.