Tronair 112850D0000, Operation & Service Manual

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28.5 VDC Ground Power Unit
Models 112850S0000 112850S0100 112850S0200
112850D0000 112850D0100/AV 112850D0100-A5 112850D0200
112860S0000 112860S0100 112860S0100-A4 112860S0100-A6 112860S0200
112860D0000 112860D0100 112860SD100-A5 112860D0200 112860SD200-A5
06/2013 | Rev. 03 Page | 13
5.2.3
Converter Commissioning (continued)
44. Observe amber warning lamp flashes if DC output volts drops below 21 VDC. LET LOAD BANK COOL, push black DC
OFF switch
45. Disconnect load bank
46. Turn disconnect on main power outlet to
OFF
47. Final inspect the unit for missing or loose components
48. When the unit passes all tests release for normal operation
5.3
SWITCHING ON
NOTE: Before switching the set on for the first time after installation, check that the cabling has been correctly
installed.
1. Connect AC input power cable to the main power outlet and apply electrical power
2. Set current limiting switch on front panel to as needed
3. Turn
GPU main disconnect switch to ON (RIGHT/HORIZONTAL)
4. Ensure green main input power lamp is ON , DC voltmeter is indicating 28.5 volts, and no other fault lamps are on
Note: Ensure DC output power is not on and DC lamps are off
5. For all models, connect the DC output cable (s) to the aircraft DC socket. Ensure cable plug is fully inserted into the
socket
6. Push the WHITE DC ON switch. Observe GREEN DC ON lamp is ON
7. The unit will operate normally
8. Push
BLACK DC OFF switch to stop
9. Turn GPU main disconnect switch to OFF (LEFT/VERTICAL)
10. Disconnect DC cable from aircraft. Disconnect AC input power cable and stow cables on GPU
NOTE: The following steps are for Dual Output Cable units
WARNING!
Do not use DC Cable 2 for starting aircraft engines 300 amps maximum output.
11. Follow steps
1 thru 5
12. Push GREEN DC ENABLE ON switch; verify GREEN DC ENABLE lamp is ON
13. Push the WHITE DC 1 or 2 ON switches; observe GREEN DC 1 or 2 lamps are ON. (USE BOTH CABLES IF
NEEDED)
14. Push BLACK DC OFF switches to stop
15. Push RED DC ENABLE OFF switch
16. Turn GPU main disconnect switch to OFF (LEFT/VERTICAL)
17. Disconnect DC cable (s) from aircraft. Disconnect AC input power cable and stow cables on GPU
NOTE: The following test is for External Voltage Adjustable units
18. Follow steps 1 thru 4
19. Connect the DC output cable(s) to the aircraft DC socket. Ensure cable plug is fully inserted into the socket
20. Adjust voltage control knob on control panel to 28 VDC mark
21. Push the
WHITE DC 1 ON switch , observe GREEN DC 1 lamps is ON
22. The unit will operate normally
23. Push
BLACK DC OFF switch to stop
24. Turn GPU main disconnect switch to OFF (left/vertical)
25. Disconnect DC cable from aircraft. Disconnect AC input power cable and stow cables on GPU
WARNING!
Even when switched off, a few components ins
ide the set remain “live“. Only trained personnel should be
allowed to work on set.
5.4
EMERGENCY STOP
In an emergency, to immediately shut off the system, the red Emergency Stop push button on the Control Panel must be
pressed. Bear in mind, however, tha
t the mains in feed is still “live”. It can only be isolated by using suitable external means