Table Of Contents - Bard MEGA-TEC W090A Service Instructions Manual

CONTENTS
General Information ...........................................4
Multi-Stage Cooling System ........................................4
Wall-Mount Air Conditioner Units ................................4
General ..................................................................4
Shipping Damage ......................................................4
Additional Publications ..............................................4
Using the TEC-EYE TM ...........................................6
TEC-EYE Hand-Held Diagnostic Tool ............................6
TEC-EYE Menu Structure .....................................7
TEC-EYE Acronyms .............................................7
Main Status Screen .............................................7
Quick Menu .......................................................7
Setpoints ....................................................7
Information .................................................9
A/C Circuit Information ..........................9
Program Version ..................................10
Software Versioning Guide ...................10
Alarm Log .................................................10
Menu Screens and Password Levels ....................10
Executing a Self Test .........................................10
Self Test Parameter Descriptions .................11
Reset to Factory Defaults ...................................11
Operation ............................................................12
Unit On/Off .............................................................12
Alarm Adjustment ..................................................12
Acknowledging Alarms.......................................12
Clearing Alarms ................................................12
Clearing Alarm Logs and Counters ......................12
Exporting Alarm Logs ........................................12
Exporting 7 Day Logs ........................................13
Configuration File .............................................13
Zone .......................................................................13
Temperature Control .................................................13
Temperature Control Components .......................13
Return Air Temperature Sensor ....................13
Return Air Temperature Alarm ..............13
Temperature Control Operation ...........................14
Orphan Mode ............................................14
LC6000 Control .........................................14
Cooling (with Economizer) ..........................14
Cooling (without Economizer) ......................14
Heating .....................................................15
Electronic Expansion Valve (EEV) ..............................15
EEV Components ..............................................15
Electronic Expansion Valve .........................15
EEV Instructions for Vacuum,
Reclaim, Charge Unit ..........................15
System Pressures ................................16
Suction Pressure Transducer .......................16
Troubleshooting the Suction Pressure
Transducer .........................................16
Suction Pressure Alarm .......................17
Suction Temperature Sensor .......................17
Suction Temperature Alarm ..................17
Evaporator Freeze Condition Alarm .......... 17
EEV Operation ..................................................18
EEV Superheat Control ...............................18
Additional EEV Alarms ......................................18
Low Superheat Alarm .................................18
Indoor Airflow ..........................................................18
Indoor Airflow Components ................................18
Blower ......................................................18
Blower Status Switch .................................19
Blower Status Alarm ............................19
Filters .......................................................19
Manual 2100-671C
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Dirty Filter Switch ......................................19
Dirty Filter Alarm ................................20
Filter Indicator Light ..................................20
Indoor Airflow Operation ....................................20
Blower Speed Control .................................20
High Sensible Operation ......................20
Balanced Climate
Additional Indoor Airflow Alarms ........................21
Supply Air Temperature Alarm .....................21
Condenser Fan ........................................................21
Condenser Fan Components ...............................21
Condenser Fan ..........................................21
Liquid Pressure Sensor ...............................22
Troubleshooting the Discharge/
Liquid Pressure Transducer ..................22
Discharge/Liquid Pressure
Transducer Alarm ................................23
Liquid Temperature Sensor .........................23
Outdoor Temperature Sensor .......................23
Condenser Fan Operation ...................................23
Condenser Fan Speed Control .....................23
Compressor .............................................................23
Compressor Components ...................................23
Compressor ...............................................23
Compressor Control Module (CCM) ..............24
Delay-on-Make Timer ...........................24
Short Cycle Protection/Delay-on-Break ..24
High Pressure Detection ......................25
Test Mode ..........................................25
Brownout Protection w/Adjustment .......... 25
High Pressure Safety Switch .......................25
Refrigerant High Pressure Alarm ...........25
Phase Monitor ...........................................25
Compressor Operation .......................................26
Additional Compressor Alarms ............................26
Refrigerant Low Pressure Alarm ...................26
Economizer .............................................................26
Economizer Components ...................................26
Actuator ....................................................26
Dust Sensor ..............................................27
Dust Sensor Failure Alarm ...................27
High Dust Limit Alarm .........................27
Damper Blade ...........................................28
Damper Switch ..........................................28
Damper Failed to Open Alarm ..............28
Damper Failed to Close Alarm ..............28
Outdoor Temperature and Humidity
Combination Sensor ...................................29
Outdoor Temperature Sensor Failure
Alarm ................................................29
Outdoor Humidity Sensor Failure
Alarm ................................................29
Mixed Air Temperature Sensor .....................29
High Mixed Air Temperature Alarm .......30
Low Mixed Air Temperature Alarm ........30
Economizer Operation .......................................30
Economizer Operation − Minimum Position ..32
Miscellaneous Components .......................................32
Supply Temperature Sensor ...............................32
Supply Temperature Sensor Failure Alarm .............. 32
Emergency Cooling Mode..........................................32
Emergency Cooling − Orphan Mode ....................32
Emergency Ventilation Mode .....................................33
Electric Heat Option ................................................33
Electric Heat Components .................................33
Operation ..............20
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