Fuse Rating - Lambda Genesys GENH 750W Technical Manual

SYMPTOM
Output Voltage will not
adjust. Front panel CC LED
is On.
Output Voltage will not
adjust Front panel CV Led is
On.
Output Current will not
adjust. Front panel CV LED
is on.
Large ripple present in
output.
No output. Display indicates
"OUP"
No output. Front panel
ALARM LED is blinking.
Poor Load regulation.
Front panel CV LED is on.
The front panel controls are
non-functional.

9.7 FUSE RATING

There are no user replaceable fuses in the power supply. Internal fuses are sized for fault protec-
tion and if a fuse was opened, it would indicate that service is required. Fuse replacement should
be made by qualified technical personnel. Refer to Table 9-2 for a listing of the fuses.
CHECK
Is the unit in constant
current mode?
Check if output voltage is
adjusted above OVP
setting or below UVL
setting.
Is the unit in constant
voltage mode?
Is the power supply in
remote sense?
Is the voltage drop on the
load wire high?
Overvoltage Protection
circuit is tripped.
Display indicates "ENA"
Display indicates "SO"
Display indicates "OTP"
Display indicates "Fb"
Are sensing wires
connected properly?
Is the power supply in
Local-Lockout mode?
73
83-507-5002 Rev. A
ACTION
Check Output Current
setting and load current.
Set OVP or UVL so they will
not limit the output.
Check Output Current and
voltage setting
Check load and sense wires
connection for noise and
impedance effects. Minimize
the drop on the load wires.
Turn off the AC power
switch. Check load
connections. If Analog
Programming is used, check
if the OVP is set lower than
the output.
Check rear panel J1
ENABLE connection.
Setup switch SW1 setting.
Check rear panel J1 Output
Shut-Off connection.
Check if air intake or
exhaust are blocked. Check
if the unit is installed
adjacent to heat generating
equipment.
Check Foldback setting and
load current.
Connect the sense wires
according to User's Manual
instructions.
Turn Off the AC power and
wait until the display turns
off. Turn on the AC power
and press front panel
REM/LOC button.
REF
5.2.1
5.2.2
5.3
5.4
5.2
3.9.4
3.9.8
5.3
5.8
4.4
5.7
5.5
3.9.8
7.2.5