SYMPTOM

CHECK

ACTION

REF

Output is present

Is the power supply

Check if the positive or

3.9.6

momentarily but shuts off

configured to Remote

negative load wire is loose.

3.9.8

quickly.The display indicates

sense?

 

 

“OUP”.

 

 

 

Output Voltage will not

Is the unit in constant

Check Output Current

5.2.1

adjust. Front panel CC LED

current mode?

setting and load current.

5.2.2

is On.

 

 

 

Output Voltage will not

Check if output voltage is

Set OVP or UVL so they will

5.3

adjust Front panel CV Led is

adjusted above OVP

not limit the output.

5.4

On.

setting or below UVL

 

 

 

setting.

 

 

Output Current will not

Is the unit in constant

Check Output Current and

5.2

adjust. Front panel CV LED

voltage mode?

voltage setting

 

is on.

 

 

 

Large ripple present in

Is the power supply in

Check load and sense wires

3.9.4

output.

remote sense?

connection for noise and

3.9.8

 

Is the voltage drop on the

impedance effects. Minimize

 

 

load wire high?

the drop on the load wires.

 

No output. Display indicates

Overvoltage Protection

Turn off the AC power

5.3

“OUP”

circuit is tripped.

switch. Check load

 

 

 

connections. If Analog

 

 

 

Programming is used, check

 

 

 

if the OVP is set lower than

 

 

 

the output.

 

No output. Front panel

Display indicates “ENA”

Check rear panel J1

5.8

ALARM LED is blinking.

 

ENABLE connection.

 

 

 

Setup switch SW1 setting.

4.4

 

Display indicates “SO”

Check rear panel J1 Output

5.7

 

 

Shut-Off connection.

 

 

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

5.5

 

 

load current.

 

Poor Load regulation.

Are sensing wires

Connect the sense wires

3.9.8

Front panel CV LED is on.

connected properly?

according to User’s Manual

 

 

 

instructions.

 

The front panel controls are

Is the power supply in

Turn Off the AC power and

7.2.5

non-functional.

Local-Lockout mode?

wait until the display turns

 

 

 

off. Turn on the AC power

 

 

 

and press front panel

 

 

 

REM/LOC button.

 

73

83-507-5002 Rev. B

Page 81
Image 81
TDK 750W HALF RACK technical manual Oup