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Trane Direct-Fired Indoor and Outdoor Make-Up Air Units, MUA-SVP01A-EN Diagnostics - Non-Critical Fault Codes

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

Diagnostics

2. Are the main automatic gas shutoff valves energized?

–No. The main automatic gas shutoff valves are leaking. Turn off unit and

close manual gas valves. Determine cause of valve failure and rectify.

–Yes . Continue.

3. Is the flame relay energized?

–No. There is a short in the wiring of the gas valves. Close manual gas

valves. Determine cause of short and rectify.

–Yes . Continue.

4. Is the burner enable relay energized?

–Yes . There is a short in the wiring of the flame relay. Close manual gas

valves. Determine cause of short and rectify.

–No. Continue.

5. Is the burner enable relay's normally open contact closed?

–Yes . Close manual gas valves. Replace the relay.

–No. Continue.

6. Unplug the input terminals from the input jack. Is there continuity at the

controller between the burner status terminals?

–No. Close manual gas valves. There is a short in the wiring between the

burner status relay and the burner status terminals. Determine cause and

rectify.

–Yes . Close manual gas valves. Replace the controller.

FAULT CODE: Flame Failure

Note: This fault code is not applicable to all unit types.

PROBLEM:The controller has received a signal from the flame relay

indicating a flame failure.

SOLUTION:Investigate flame relay

1. Is there a prior alarm such as Unit On/Fan Off, Airflow Sw., or Safety Circuit?

–Yes . See the Diagnostic section for the previous alarm.

–No. Continue.

2. See flame relay troubleshooting information in unit Installation, Operation,

and Maintenance Manual.

Diagnostics - Non-Critical Fault Codes

This section should assist the user in troubleshooting non-critical fault code

messages that have been displayed on the local user interface. Most of these

faults are automatically reset once the fault is corrected or condition changes.

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