D-EOMZC00204-18_04EN 2/54
TABLE OF CONTENTS
1 SAFETY CONSIDERATIONS ....................................................................................................................................... 4
1.1 General ..................................................................................................................................................................................... 4
1.2 Avoid electrocution.................................................................................................................................................................... 4
1.3 Safety Devices .......................................................................................................................................................................... 4
2 GENERAL DESCRIPTION ............................................................................................................................................ 5
2.1 Basic Information ...................................................................................................................................................................... 5
2.2 Abbreviations used ................................................................................................................................................................... 5
2.3 Controller Operating Limits ....................................................................................................................................................... 5
2.4 Controller Architecture .............................................................................................................................................................. 5
2.5 Communication Modules........................................................................................................................................................... 6
3 USING THE CONTROLLER ......................................................................................................................................... 7
3.1 General Recommendation ........................................................................................................................................................ 7
3.2 Navigating ................................................................................................................................................................................. 7
3.3 Passwords ................................................................................................................................................................................ 8
3.4 Editing ...................................................................................................................................................................................... 8
3.5 Basic Control System Diagnostic .............................................................................................................................................. 8
3.6 Controller maintenance ............................................................................................................................................................. 9
3.7 Optional Remote User Interface .............................................................................................................................................. 10
3.8 Embedded Web Interface ....................................................................................................................................................... 10
4 WORKING WITH THIS UNIT ...................................................................................................................................... 12
4.1 Unit Setup ............................................................................................................................................................................... 12
4.1.1 Control Source .............................................................................................................................................................. 12
4.1.2 Operating Mode ............................................................................................................................................................. 12
4.1.3 Temperature Settings .................................................................................................................................................... 13
4.1.4 Thermostatic control ...................................................................................................................................................... 13
4.1.5 Pumps settings .............................................................................................................................................................. 15
4.1.6 Alarm Settings ............................................................................................................................................................... 16
4.1.7 Power Conservation ...................................................................................................................................................... 16
4.1.7.1 Demand Limit ....................................................................................................................................................... 16
4.1.7.2 Current Limit (Optional) ........................................................................................................................................ 16
4.1.7.3 Setpoint Reset ..................................................................................................................................................... 17
4.1.7.4 Setpoint Reset by OAT Reset .............................................................................................................................. 17
4.1.7.5 Setpoint Reset by External 4-20 mA Signal .......................................................................................................... 17
4.1.7.6 Setpoint Reset by Evaporator Return Temperature .............................................................................................. 17
4.1.8 Date/Time ...................................................................................................................................................................... 17
4.1.8.1 Date, Time and UTC Settings ............................................................................................................................... 17
4.1.8.2 Quiet Mode Scheduling ........................................................................................................................................ 17
4.1.9 Scheduler ...................................................................................................................................................................... 18
4.2 Unit/Circuit Start-up................................................................................................................................................................. 18
4.2.1 Prepare the unit to start ................................................................................................................................................. 18
4.2.1.1 Unit Enable .......................................................................................................................................................... 18
4.2.1.2 Switch Enable ...................................................................................................................................................... 19
4.2.1.3 Keypad Enable ..................................................................................................................................................... 19
4.2.1.4 BMS Enable ......................................................................................................................................................... 19
4.2.2 Unit Status ..................................................................................................................................................................... 19
4.2.3 Circuits Enable .............................................................................................................................................................. 20
4.2.4 Circuit Status ................................................................................................................................................................. 20
4.2.5 Circuit Preventions ........................................................................................................................................................ 21
4.2.5.1 High Water Temperature Limit ............................................................................................................................. 21
4.2.5.2 Low Evaporating Pressure ................................................................................................................................... 21
4.2.5.3 High Condensing Pressure................................................................................................................................... 21
4.2.5.4 High Vfd Current .................................................................................................................................................. 21
4.2.5.5 High Discharge Temperature ............................................................................................................................... 22
5 TROUBLESHOOTING ................................................................................................................................................ 23
5.1 Unit Alerts ............................................................................................................................................................................... 23
5.1.1 Bad Current Limit Input .................................................................................................................................................. 23
5.1.2 Bad Demand Limit Input ................................................................................................................................................ 23
5.1.3 Bad Leaving Water Temperature Reset Input ................................................................................................................ 24
5.1.4 Condenser Pump #1 Failure .......................................................................................................................................... 24
5.1.5 Condenser Pump #2 Failure .......................................................................................................................................... 24
5.1.6 Energy Meter Communication Fail ................................................................................................................................. 25
5.1.7 Evaporator Pump #1 Failure .......................................................................................................................................... 25
5.1.8 Evaporator Pump #2 Failure .......................................................................................................................................... 26
5.1.9 External Event ............................................................................................................................................................... 26
5.1.10 Fan Alarm Module Communication Fail ......................................................................................................................... 26
5.1.11 Heat Recovery Entering Water Temperature sensor fault .............................................................................................. 27
5.1.12 Heat Recovery Leaving Water Temperature sensor fault ............................................................................................... 27
5.1.13 Heat Recovery Water Temperatures inverted ................................................................................................................ 27
5.1.14 Rapid Recovery Module Communication Fail ................................................................................................................ 28
5.1.15 Switch Box Temperature sensor fault ............................................................................................................................ 28
5.1.16 Condenser over heat fault ............................................................................................................................................. 28
