Section 1
Ref: REFLEX/SCANFLEX MANUAL
EDITION 1: JULY ’97 38
SINGLE POINT REFLEX
FAULT FINDING & COMMISSIONING GUIDE
Before investigating a system fault, ensure that the pre-start check on Pages 12 & 13 has been
done. We recommend that you list all your application programme parameters before
proceeding.
A) The display is blank, l.e.d.'s are unlit, neon not firing:-
1. Ensure that power is being supplied to the unit and that wiring is correct
- refer to Page 3.
2. Check fuses F5 (AC) or F6 (DC).
3. Check that the supply is within specified limits - refer to Page 3.
B) The fuse blows continually:-
1. Power-down and fit a new fuse - refer to Page 3.
Disconnect all cabling from the unit except power, if the fuse does not blow,
there is a fault in the external wiring.
2. Check that the supply is within specified limits - refer to page 3.
3. Check for metal debris under the bottom PCB.
C) The system power-up but display is blank:-
1. Power-down and check that the main eprom is fitted correctly at U7 on the top
PCB.
D) The display shows 'LOSS OF ECHO'
1. Check transducer type selection at Pr.2.
2. Check transducer wiring and connections to the instrument - refer to Page 3
and 50-52. Note the different connections for the temperature compensated
transducer (RXT15 Series).
3. Check whether the neon adjacent to terminal 22 is flashing.
If it is, proceed to 4.
If not, then:-
a) Disconnect the transducer: If the neon now flashes there is a short
circuit in the cabling. If it does not flash, the transmission fuse may
have blown. Check F1 and F2 T80mA fuses on the bottom PCB.
b) If the unit still shows 'LOSS OF ECHO', check that you can hear the
transducer clicking when close to the ear.
c) If you have extended the transducer cable, disconnect and remove the
transducer and connect it direct to the Reflex. If the unit now operates,
re-check the extension cabling connections and routing, avoiding
power cables. Re-install the transducer and check its aiming.
d) If the transducer does not click, proceed to 6.
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