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Trane Direct-Fired Indoor and Outdoor Make-Up Air Units, MUA-SVP01A-EN FAULT CODE: Check Airflow Switches

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MUA-SVP01A-EN • Direct-Fired Indoor and Outdoor Units 35

Diagnostics

–Yes . Continue.

3. Is the unit enable relay energized?

–No. There is an open in the wiring between these terminals. Determine

cause and rectify.

–Yes . Continue.

4. Is the unit enable relay's normally open contact, closed?

–No. Replace relay.

–Yes . Continue.

5. Is the motor overload relay tripped?

–Yes . Determine cause, rectify and reset.

–No. Continue.

6. Is the motor starter energized?

–No. There is an open or break in the wiring. Determine cause and rectify.

–Yes . Check motor and motor wiring.

FAULT CODE: Check Airflow Switches

PROBLEM: The controller has activated the unit enable output to start the fan,

and detected that the fan is running from a signal at the fan status input.

Subsequently, the controller has detected a momentary opening of the fan status

input. The momentary opening must occur within two seconds of the previous

closure for this fault to occur. This fault requires the operator to correct the

condition and reset the alarm before normal unit operation resumes.

SOLUTION:If high airflow switch is opening. Do not adjust the switch

setpoints

1. Are all of the filters in place?

–No. Install filters and continue.

–Yes . Continue.

2. Does the external static pressure match that listed on the rating plate?

–No. Verify all associated ductwork is installed and continue.

–Yes . Continue.

3. Does the fan RPM match that listed on the Spec. Sheet?

–No. Correct to reduced fan speed and continue.

–Yes . Continue.

4. Are the airflow switches' sensing tubes obstructed?

–Yes . Clear and continue.

–No. Continue.

5. Contact factory.

Contents

Main Overview NETWORKING ADAPTAIRE DEFAULT SETTINGS Page Contents Unit Operating Modes Functions Diagnostics Menu Selection Contents Thermostat Output Curve Airflow Station Layout I/O Zone 583 Controller Specifications Typical Wiring Schematic Unit Operating Modes MDT Controls: MRT Controls: MRT-Pro Controls: Page MRT-Expert Controls: Page Heating/Ventilating/Cooling Operating Modes Heating Mode General Burner Control Page Ventilation Mode Cooling Mode Figure 1. Cooling Mode Damper Control Modes Manual Mode Mixed Air Temperature Mode Building Pressure Mode Functions 100% Outside Air Minimum Ventilation Freezestat Clogged Filter User Configured PID Control DIRECT ACTING Page REVERSE ACTING Page Unit Resets Multiplexed Inputs Clock Set Diagnostics Critical Fault Codes FAULT CODE: Low Discharge Temperature Page SOLUTION: If burner was not operating prior to shutdown (check prior alarm log) FAULT CODE: Safety Circuit Open SOLUTION:If fan is running (check prior alarm log) FAULT CODE:Burner Status FAULT CODE: Burner Hand FAULT CODE: Flame Failure Diagnostics - Non-Critical Fault Codes FAULT CODE: Unit off/Fan on SOLUTION: If fan is running SOLUTION: If fan is not running FAULT CODE:Unit on/Fan off SOLUTION:If fan/motor is running SOLUTION: If fan/motor is not running FAULT CODE: Check Airflow Switches SOLUTION:If high airflow switch is opening. Do not adjust the switch setpoints SOLUTION:If low airflow switch is opening. Do not adjust the switch setpoints FAULT CODE: Clogged Filter Switch SOLUTION:If clogged filter switch is closing. FAULT CODE:Energy Save Mode 1 SOLUTION:If setpoints are misadjusted SOLUTION:If setpoints are not misadjusted FAULT CODE:Energy Save Mode 2 SOLUTION: If OAT, RoomT or DAT are such that heat is required FAULT CODE:Energy Save Mode 3 SOLUTION: If OAT, RoomT or DAT are such that heat is required SOLUTION: If setpoints are misadjusted FAULT CODE:Insufficient OA SOLUTION:If heat is desired SOLUTION:If less outside air is desired Page Menu Selection Tree for BACview UNIT MODES HOTKEY - 2 Menu Selection Status Alarm SET POINTS HOTKEY - 3 STATUS MENU HOTKEY - 4 Note: The Status Menu always displays the current status of the fan, burner and cooling. ALARM HOTKEY - 1 Alarm History (64 Most Recent) RESETS HOTKEY - 6 SCHEDULES HOTKEY- 7 USER CONFIGURABLE OUTPUT HOTKEY - 8 CLOCKSET HOTKEY - 0 HELP HOTKEY - 5 FUEL SELECT HOTKEY - 9 10 K Ohms Thermistor Output Curve Thermostat Output Curve Resistance (Ohms) Typical 10,000 Ohm Thermistor Output Curve Resistance (Ohms) Typical 10,000 Ohm Thermistor Output Curve Page I/O Zone 583 Controller Specifications I/O Zone 583 Controller Specifications OUTPUT ASSIGNMENTS - ANALOG RNET MRT-Pro or Room Air sensor OUTPUT ASSIGNMENTS - DIGITAL INPUT ASSIGNMENTS - UNIVERSAL