TDK-Lambda Genesys User Manual page 105

SYMPTOM
No output. All displays and indicators
are blank.
Output is present momentarily but
shuts off quickly. The display
indicates "AC".
Output is present momentarily but
shuts off quickly.The display indicates
"OUP".
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
nonfunctional.
Table 10-1: Troubleshooting Guide
CHECK
Is the AC power cord defective?
Is the AC input voltage within
range?
Does the AC source voltage sag
when load is applied?
Is the power supply configured to
Remote sense?
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?
Over Voltage 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?
99
83532002 Rev C
ACTION
Check continuity, replace if
necessary.
Check AC input voltage.
Connect to appropriate voltage
source.
Check AC input voltage.
Connect to appropriate voltage
source.
Check if the positive or
negative load wire is loose.
Check current limit setting and
load current.
Set OVP or UVL so they will
not limit the output.
Check current limit 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 SW1 switch 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
3.7
3.6
3.7
3.6
3.9.8
3.10.3
5.2.1
5.2.2
5.3
5.4
5.2.1
5.2.2
3.9.2
3.9.5
3.10.3
5.3
5.8
5.8
5.7
1.2.7
3.5
5.13
5.5
3.9
3.10.3
5.12
8.2.5