TROUBLE SHOOTING
SM3300
27 / 30
DELTA ELEKTRONIKA B.V.
rev. Jan. 2022
8.6
OT indicator blinks
The temperature of the internal heat sink is too high, the
output has been shutdown to avoid overheating.
Check if the cooling fan is running.
Check if the air temperature of the air inlet (left) is below
50 °C and the airflow is not obstructed.
8.7
ACF indicator on
The input voltage is too low or was intermittent because of a
bad connection. Disconnect the mains, wait a few minutes
and try again.
If the input voltage is within the specified range, there must be
an internal error. Send unit for repair, see paragraph 1) of this
chapter.
8.8
DCF indicator on
The output voltage is 5% below/above the set voltage. This
automatically happens when the unit is in CC-mode.
If the output voltage is within the set value, there must be an
internal error. Send unit for repair, see paragraph 1) of this
chapter.
8.9
PSOL indicator on
The Power Sink is in overload or the temperature of the
Power Sink is too high. See datasheet of the Power Sink for
further details.
8.10
Internal Error indicator on
This indicator is active if there is an internal error in the unit,
or when an interface is not correctly configured. Verify the
"System information" page of the web interface. Or contact
support.
8.11
Forgotten password, access key or network
settings
To reset the front panel access key, the password and the
network settings to their default values, press the reset button
at the rear panel of the unit.
A bent paperclip can be used to press the internal micro push
button (see fig 8-9).
A soft sensible click can be noticed. Press and hold the button
for at least 2 seconds in order to activate the default restoring
mechanism.
8.12
Other
If the problem is not described in the above paragraphs,
please see paragraph 1 of this chapter on how to contact our
support department, or send the unit for repair.
fig 8 - 4
If the OT-icon is shown on the display, the unit has
run hot and the DC power terminals are shut down.
fig 8 - 9
Location of the reset button.
fig 8 - 6
If the DCF-icon is shown on the display, the voltage
at the DC power terminals is 5% below/above the set
voltage.
fig 8 - 8
If the Internal Error-icon is shown on the display,
the DC-power output of the unit will shut down.
fig 8 - 5
If the ACF-icon is shown on the display, the unit
has not enough AC input power and the DC power
terminals are shut down.
fig 8 - 7
If the PSOL-icon is shown on the display, the power
sink has reached the power limit.
