90
AGR 070A through 100A
IOMM AGR-1
Figure 39, Output Board Relay Socket
1
2
3
4
5
LED
Fuse
Test Resistor
330-680 Ohm
*250V ~ 50/60 Hz
*120V ~ 50/60 Hz
WARNING
Electric shock hazard. Can cause severe injury or death. Even when power to the panel is
off, solid-state relay socket terminals 1 and 2 on the output board could be connected to high
voltage. Avoid them.
One LED Out
If one of the Output Board LEDs fails to illuminate when the MCB is commanding the associated
output to energize, perform the following procedure:
1.
Remove power from the controller by opening CB1. Swap the suspect relay with a known good
relay. Try to choose a relay that will not affect unit operation. Restore power by closing CB1.
If the LED does not light, go to step 2.
If the LED lights, the suspect relay is defective.
2.
Remove power from the controller. Check the ribbon cable and connections between the OB and
the MCB. Look for bent pins.
If the cable and connections are intact, go to step 3.
3.
Remove the relay from the suspect socket. Install a 330-680 ohm resistor between terminals 3
and 5. Restore power by placing CB1 to the ON position. The LED should light regardless of
the controller’s command.
If the output LED illuminates, it is likely that the MCB is defective.
If the output LED does not illuminate, the output board is defective.
All LEDs Out
If the MCB is commanding at least two outputs to energize and none of the Output Board LEDs are
lit, perform the following procedure:
1.
Verify that 5 Vdc is present at the Output Board’s power terminals.
If 5 Vdc is not present, go to step 2.
If 5 Vdc is present, check the ribbon cable and connections between the output board and MCB.
Look for bent pins. If the cable and connections are intact, the Output Board or the MCB is
defective.
Summary of Contents for AGR 070AS
Page 20: ...20 AGR 070A through 100A IOMM AGR 1 Figure 9 Typical Field Wiring with Global UNT Controller...
Page 22: ...22 AGR 070A through 100A IOMM AGR 1 Figure 11 Standard Single Point Connection with FanTrol...
Page 24: ...24 AGR 070A through 100A IOMM AGR 1 Figure 13 Unit Control Schematic 2 compressor UNT...
Page 25: ...IOMM AGR 1 AGR 070A through 100A 25 Figure 14 Staging Schematic 2 compressor 4 stage UNT...
Page 26: ...26 AGR 070A through 100A IOMM AGR 1 Figure 15 Staging Schematic 2 compressor 6 stage UNT...
Page 27: ...IOMM AGR 1 AGR 070A through 100A 27 Figure 16 MicroTech Controller Schematic...
Page 28: ...28 AGR 070A through 100A IOMM AGR 1 Figure 17 Unit Control Schematic MicroTech...
Page 29: ...IOMM AGR 1 AGR 070A through 100A 29 Figure 18 Staging Schematic 4 stage MicroTech...
Page 30: ...30 AGR 070A through 100A IOMM AGR 1 Figure 19 Staging Schematic 6 stage MicroTech...
Page 31: ...IOMM AGR 1 AGR 070A through 100A 31 Figure 20 Unit Control Schematic 2 compressor MicroTech...
Page 32: ...32 AGR 070A through 100A IOMM AGR 1 Figure 21 UNT Instrument Layout See legend on page 34...
Page 35: ...IOMM AGR 1 AGR 070A through 100A 35 Figure 25 MicroTech Sensor Layout...
Page 99: ...IOMM AGR 1 AGR 070A through 100A 99 Notes...
Page 100: ...Post Office Box 2510 Staunton Virginia 24402 USA 800 432 1342 www mcquay com...
