TDK-Lambda GENESYS 750W HALF RACK, Technical Manual

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83-507-5002 Rev. B
73
SYMPTOM CHECK ACTION REF
Output is present
momentarily but shuts off
quickly.The display indicates
“OUP”. Is the power supply
configured to Remote
sense? Check if the positive or
negative load wire is loose. 3.9.6
3.9.8
Output Voltage will not
adjust. Front panel CC LED
is On. Is the unit in constant
current mode? Check Output Current
setting and load current. 5.2.1
5.2.2
Output Voltage will not
adjust Front panel CV Led is
On. Check if output voltage is
adjusted above OVP
setting or below UVL
setting. Set OVP or UVL so they will
not limit the output. 5.3
5.4
Output Current will not
adjust. Front panel CV LED
is on. Is the unit in constant
voltage mode? Check Output Current and
voltage setting 5.2
Large ripple present in
output. Is the power supply in
remote sense?
Is the voltage drop on the
load wire high? Check load and sense wires
connection for noise and
impedance effects. Minimize
the drop on the load wires. 3.9.4
3.9.8
No output. Display indicates
“OUP” Overvoltage Protection
circuit is tripped. Turn off the AC power
switch. Check load
connections. If Analog
Programming is used, check
if the OVP is set lower than
the output. 5.3
No output. Front panel
ALARM LED is blinking. Check rear panel J1
ENABLE connection. 5.8 Display indicates “ENA”
Setup switch SW1 setting. 4.4
Display indicates “SO” Check rear panel J1 Output
Shut-Off connection. 5.7
Display indicates “OTP” Check if air intake or
exhaust are blocked. Check
if the unit is installed
adjacent to heat generating
equipment.
Display indicates “Fb” Check Foldback setting and
load current. 5.5
Poor Load regulation.
Front panel CV LED is on. Are sensing wires
connected properly? Connect the sense wires
according to User’s Manual
instructions. 3.9.8
The front panel controls are
non-functional. Is the power supply in
Local-Lockout mode? Turn Off the AC power and
wait until the display turns
off. Turn on the AC power
and press front panel
REM/LOC button. 7.2.5