72-8355 TENMA, 72-8355 Datasheet - Page 10

• Manufacturer Part Number: 72-8355
• Description: POWER SUPPLY, SWITCH MODE, 16V
• Manufacturer: TENMA

Specifications of 72-8355

• Power Supply Output Type: Variable
• No. Of Outputs: 1
• Output Voltage: 16V
• Output Current: 5A
• Power Rating: 80W
• Input Voltage: 90V AC To 264V AC
• Length: 330.2mm
• Width: 50.8mm
• Height: 127mm
• Weight: 4.2lb

9. Troubleshooting
PROBLEM
Power supply not
working
No DC output power
Voltage meter read
outs grossly
inaccurate
Ampere meter
reading grossly
inaccurate
The activated (auto-
cross over ) current
limiting value is
different from the
preset cc value
panel display, LED
Indicators not on
displays zero. ALM
(13) Alarm led on
ALM (13) Alarm led
on CC (12) led on
Actual output voltage
is grossly different
from the meter read
outs
In CV mode , the
actual current
measured is grossly
different from the
Amp meter reading
All indicators and
display are normal ,
only CC mode has
the problem
INDICATIONS
Voltage meter
POSSIBLE CAUSES
1. AC power input
not connected 2. AC
input fuse blown
A. output on off
button not on.
B. UVL (10 )
protection triggered
C. OTP protection
triggered
D. output short
circuit
A. Volt meter shows
not the output
voltage.
B. possible
misalignment in
voltmeter calibration
Possible
misalignment in
calibration .
For stand alone unit,
Master & Slave
Switch (17) in wrong
position (Slave).
Wrong setting or
connection in Master
& Slave or set up
procedure.
10
SUGGESTED
SOLUTIONS
Check AC power
connection.
A. check output LED
(9) is on or not,
push (9) to on. B.
check UVL set
voltage by pushing
(6), re-set UVL to
applicable limit, see
section 5 and 6 . C.
check vent holes at
top and bottom is
clear, ambient
temperature too
high . D. check and
undo short circuit of
output connection.
A. check the LED
indicator of UVL on
the top right hand
side of the Volt
meter, if it lights up
then the volt meter
only shows the set
UVL value. Push (6)
to go back to output
voltage. B. contact
local agent or send
back to local agent
for recalibration
contact local agent
or send back to
local gent for
recalibration
Check the Master &
Slave switch (17)
correct position.
Use stand alone
mode to check
power supply
separately without
any connection to
slave units. Follow
the procedure in
section 8 carefully
and make sure there
is only one Master
unit.