12 | SAMLEX AMERICA INC.
4.1 TROUBLESHOOTING GUIDE IS GIVEN AT TABLE 4.1 BELOW
NOTE: This guide is based on operation as a power supply (only DC load is connected - no
external battery or battery backup).
TABLE 4.1 TROUBLESHOOTING GUIDE
Symptom
Possible Cause
Remedy
ON / OFF Switch is ON
• Switch is NOT lighted
• No DC output
No AC power from the
AC outlet
Check AC power is available at the AC outlet.
Breaker feeding the AC outlet may have tripped.
Internal AC side fuse is
blown
(i) Open the top cover and check the AC side
fuse. Replace if blown.
(ii) If the fuse blows again, the input section is
damaged. Please call Tech Support.
Unit has shut down due
to over temperature –
Temperature of Primary
Heat Sink is ≥ 105°C ± 5°C
For SEC-1223P / 1235P / 1235P-M:
(i) Check that the fan is running. If not, the
fan / fan control circuit may have been
damaged. Call Tech Support.
(ii) Check that fan air suction rents on the sides
(5, Figs 2.2 and 2.3) and bottom (6, Fig 2.2
and 2.3) and fan air discharge vents (8, Figs
2.2 and 2.3) are not blocked.
(iii) The unit will reset automatically when the
Primary Heat Sink cools down to 75°C ±
5°C or below.
For SEC-1223P / 1235P / 1235P-M:
(i) Check the ventilation slots on the top cover
(5, Fig 2.1) and in the bottom housing
(6, Fig 2.1) are not blocked.
(ii) Check ambient temperature is withing
specifications in Section 6.
(iii) The unit will reset automatically when the
Primary Heat Sink cools down to 75°C ±
5°C or below.
ON / OFF Switch is ON
• Switch is lighted
• DC Output voltage is in
Hiccup Mode:
On
à
Off for 2 to 3 sec
à
On
à
Off for 2 to 3 sec
à
Off (This sequence is
repeated continuously).
Refer to Section 3.4 for details.
•
The output side is
overloaded as the value
of the load current is
higher than the value of
the output current limit
(Refer to output current
limit specifications at
Section 6).
•
There’s a short circuit on
the load side.
•
Reduce the current drawn by the load to
less than the DC output current limit value
(Refer to output current limit specifications in
Section 6).
•
Switch OFF the load. Remove the short circuit
on the load side.
GFCI outlet / GFCI breaker
supplying AC power to the
unit trips when the unit is
switched ON
RF noise currents from
the unit that are filtered
to Earth Ground have
increased the net Leakage
Current on the GFCI outlet
/ GFCI breaker to > 5mA
(i) Switch OFF other SMPS devices operating
from the same GFCI outlet / GFCI breaker to
reduce the net leakage current to < 5mA
(ii) Move the unit to another GFCI outlet / GFCI
breaker that has lesser number of SMPS
load(s) or no SMPS load
(ii) Power the unit from normal, non GFCI outlet or
from an outlet not protected by GFCI breaker
SECTION 4
| Troubleshooting Guide
Summary of Contents for SEC-1212P
Page 23: ...SAMLEX AMERICA INC 23 Notes ...
