Troubleshooting
31
Manual # 42-02-U001, Rev C1
TAPS Does Not Engage when Commercial AC Fails
1. Verify that the AC/TAPS DISCONNECT switch is turned ON.
2. Check that the TAPS BYPASS switch is in the NORMAL position.
3. Verify that the TAPS VF board is energized and displaying OPER. (Refer to Circuit
Board Troubleshooting below for more detail.)
4. Check wiring connections at the back of the UPS unit.
5. Check fuses FO1 and FO2. Replace if necessary.
6. Verify that UPS switch is turned on. (Check on/off button on front of unit.)
7. Verify transformer T1 jumper wires are installed correctly.
Jumper Schedule, 3 kVA TAPS Units” on page 13
.
Utility Power Normal; No Feed-Through Operation
1. Check fuses FL1 and FL2. Replace if necessary.
2. Verify AC/TAPS DISCONNECT switch is ON.
3. Verify that the TAPS VF board is energized and displaying OPER. (Refer to Circuit
Board Troubleshooting below for more detail.)
4. Verify relay TDJ is energized.
5. Check power connections L1, L2, L3 and L1X, L2X, L3X if
KM0
contactor is picked.
Circuit Board Troubleshooting
Verify presence of 24V at terminals 24- and 24+ on the TAPS VF board. The measured voltage
should range from 23 to 24 VDC. If not, check the following:
1. Remove the connector and measure the voltage with the board disconnected. If voltage
is present and with 23 to 25 VDC, replace the TAPS-VF board. (MCE part number TAPS-
VF.)
2. Verify UPS is turned ON.
3. Verify AC/TAPS DISCONNECT switch is in the ON position.
4. Verify that BS1 and BS2 contacts have continuity (closed) when the main breaker at the
wall is in the ON position.
5. Replace 24 VDC power supply located at the back of the TAPS unit behind the UPS.
(MCE part number 30-01-0010.)
6. Check for broken or loose wires.
UPS Troubleshooting
Indications:
• Fault indicator is lighted.
• UPS unresponsive to back up.
1. Turn OFF UPS.
2. Turn OFF AC feed to UPS as follows:
• TAPS-3kVA: Turn OFF breaker at back of UPS (down position).
• TAPS-6kVA: Turn OFF breaker at back of UPS.
3. Turn ON UPS.
4. Turn ON AC feed to UPS.
Содержание TAPS
Страница 6: ...2 Manual 42 02 D001 Rev A 1 September 2003...
Страница 15: ...Installation 9 Manual 42 02 U001 Rev C1 Figure 5 6kVA UPS Enclosure Base Assembly...
Страница 16: ...10 Manual 42 02 U001 Rev C1 Figure 6 6kVA UPS Enclosure Assembly...
Страница 40: ...34 Manual 42 02 U001 Rev C1 6kVA Units The 6kVA unit uses an LCD as well as LEDs...
Страница 42: ...36 Manual 42 02 U001 Rev C1 6 12 12...
Страница 43: ...TAPS Drawings 37 Manual 42 02 U001 Rev C1...
Страница 44: ...38 Manual 42 02 U001 Rev C1...
Страница 45: ...TAPS Drawings 39 Manual 42 02 U001 Rev C1...
