Orion-system MODGAS-X Manual de usuario descargar pdf (Pagina 20)

TROUBLESHOOTING

MODGAS-X Field Technical Guide

Figure 11: MODGAS-X Controller LED Locations and Descriptions

FAN LED

LOW SPEED FAN LED

AUXILIARY HEAT LED

NOT USED

ALARM LED

COMM LED

POWER LED

HEAT ENABLE LED

STATUS LED

ALARM LED

MODGAS-X CONTROLLER

(OE377-26-00058)

Supply Air Temperature Failure:

• Verify that the Supply Air Temperature Sensor is

connected to the SAT and GND on the MODGAS-X

(stand-alone mode or when using Retroﬁ t

Applications. See Table 7, page 24.) or to AI2 and

GND on speciﬁ c Main Controllers (communicating

mode). See Table 7, page 24.

• Remove SAT and GND wiring from MODGAS-X

and ohm the sensor out (this may indicate open or

failed wiring). Refer to chart in back of this guide for

readings.

• Verify the SAT OPTIONS jumper settings on the

MODGAS-X for the Supply Air Temperature Sensor.

Sat Cutoff Mode:

• Remove SAT and GND wiring from the MODGAS-X

and ohm the sensor out (this may indicate open or

failed wiring). Refer to chart in back of guide for

readings.

Alarms & LED Locations

• With Supply Air Sensor disconnected from the

MODGAS-X, set volt meter to DC volts and measure

voltage between SAT and GND on board. Refer to

Tables 5 & 6, pages 21 & 22 for readings.

• Verify Supply Air Temperature Sensor reading in duct

with 3rd party temperature testing device.

Communications Loss:

• Check COMM LED on MODGAS-X.

• Verify 24 VAC power to all interconnected

WattMaster controllers.

• Verify connection between the MODGAS-X

and associated WattMaster controllers.

• In communication mode (connected to a an AAON

Unit with modular cable), conﬁ rm that Unit

Controller’s MODGAS-X status screen displays

MODGAS-X’s Supply Air Temperature and that Main

MODGAS screens show COMM MODE.

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Orion-system MODGAS-X Manual de usuario Pagina 20

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