C740A22
The solenoid voltage
is not 0 before
activation
Same as C740A
C740A23
The solenoid voltage
is not 48V after
activation
Same as C740A
C740A24
The left Three-
Position Enabling
button is
inconsistent
Check for connections
problem. Check 3PE
functionality
a) Do not press the button
repeatedly
b) Remove any pressure off
the button
c) Press the button with
more pressure, if light
pressing may not work
d) Update software
e) Contact your local
Universal Robots service
provider for assistance
C740A25
The right Three-
Position Enabling
button is
inconsistent
Check for connections
problem. Check 3PE
functionality
Same as C740A24
C740A26
State for the Three-
Position Enabling
button
Check for connections
problem. Check 3PE
functionality
Same as C740A24
C900A
Debug message
data
7.2. LED indicators and Fuses on Safety Control Board
Safety Control Board (SCB)
1. Fuse 48 V:
The 5A fuse (F801) “48V” protects all 48V in the system inclusive of Euromap from over
current.
This information is only for troubleshooting. Do NOT replace the fuse under any
circumstances.
In case of failure, ONLY replace the SCB with a new tested board.
2. Fuse 24 V:
2 x 5A fuses (F1001 and F1002) in parallel protect the DI/DO 24 V supply on the Safety
Control Board, whether the 24 V is from the controller or external power supply. Do NOT
replace the fuses under any circumstances. In case of failure ONLY replace the SCB with a
new tested board.
3. LED indicators:
Service Manual
199
UR5
7. Troubleshooting
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