SamplexPower PSR-1200-24, Руководство пользователя, Страница: 46 / 100

46 | SAMLEX AMERICA INC.
SECTION 9 | Operation
9.1 SWITCHING ON AND SWITCHING OFF THE INVERTER SECTION
The Inverter Section of the unit can be switched ON and OFF as follows:
• Using 3-Position Rocker Switch (1, Fig 6.1) as follows:
§
Center position: OFF
§
Upper edge of the switch is pressed down towards marking “ON”: Inverter Section is switched ON
• Through Wired Remote On/Off Control:
§ Bottom edge of the switch is pressed down towards marking “EXT Switch”
§
The unit will then be switched ON and OFF through 1 of the 4 methods using Wired Remote
ON / OFF Control (See Section 5.7 for details)
WARNING!
Refer to Fig 5.1.
If AC GRID input is being fed to the unit through AC Inlet (18, Fig 6.2) and has been switched ON,
it will be bypassed to the AC outlets (17, Fig 6.2) even if the Inverter Section has been switched
OFF either through the 3-Position Rocker Switch or through the Wired Remote On/Off Control.
See explanation below:
As soon as AC GRID input is available, Relays RL-1 and RL-2 will get energized (even if the Inverter
Section has been switched OFF either through the 3-Position Rocker Switch or through the Wired
Remote On/Off Control). Normally Open (NO) contact pairs 1-2 and 3-4 will be closed. As the In-
verter section is OFF / not supplying the load, the Normally Closed (NC) contacts of Relays RL-4 and
RL-5 will bypass the AC GRID input voltage to the AC Outlets (17, Fig 6.2)
9.2 POWERING ON THE LOADS
After the Inverter is switched on, it takes a finite time for the inverter to be ready to deliver full power.
Hence, always switch on the load(s) after a few seconds of switching on the Inverter. To prevent possibility
of premature overload protection, avoid switching on the Inverter with the load already switched ON.
9.3 OPERATION OF COOLING FANS
The unit has 3 cooling fans located behind the air inlet slots in the front of the unit (8a, Fig 6.1). The fans
draw cool air from the air inlet slots in the front of the unit and expel the hot air through the discharge
vents in the back (20, Fig 6.2).
The fans are switched ON and OFF based on (i) the load current and (ii) temperature of 2 internal hot spots
near 2 heat sinks (temperature of the 2 hot spots is sensed by Negative Temperature Coefficient (NTC) resis-
tors NTC1 and NTC2). Fan control logic is as follows:
•
Load Controlled Operation:
§
Switch ON fans when load is > 300W
§
Switch OFF fans when load is reduced to <280W
• Temperature controlled Operation:
§ Switch ON when any one of the 2 hot spots near the 2 heat sinks is ≥ 50°C
§
Switch OFF fans when both the 2 hot spots near the 2 heat sinks are ≤ 45°C