Table of Contents
1 INTRODUCTION .................................................................................................................................... 4
2 CONTROLLER OPERATING LIMITS .................................................................................................... 5
3 CONTROLLER FEATURES .................................................................................................................. 5
4 GENERAL DESCRIPTION..................................................................................................................... 6
4.1 GENERAL DESCRIPTION .................................................................................................................... 6
4.2 OPERATION COMMANDS LAYOUT ....................................................................................................... 6
4.3 CONTROLLER DESCRIPTION ............................................................................................................... 7
4.4 CONTROL NETWORK DETAILS ............................................................................................................10
5 SEQUENCE OF OPERATION ..............................................................................................................11
6 CONTROLLER OPERATION ...............................................................................................................14
6.1 MICROTECH INPUTS/OUTPUTS ..........................................................................................................14
6.2 EXTENSION I/O COMPRESSOR #1 TO #3 ............................................................................................14
6.3 I/O EXV CIRCUIT #1 TO #3 ...............................................................................................................15
6.4 EXTENSION I/O FAN MODULE CIRCUIT #2 ..........................................................................................16
6.5 EXTENSION I/O FAN MODULE CIRCUIT #3 ..........................................................................................16
6.6 EXTENSION I/O UNIT HEAT PUMP (OLD VERSION) ..............................................................................16
6.7 EXTENSION I/O UNIT HEAT PUMP (NEW VERSION)..............................................................................16
6.8 SETPOINTS......................................................................................................................................16
7 UNIT FUNCTIONS ................................................................................................................................17
7.1 CALCULATIONS ................................................................................................................................17
7.2 UNIT MODEL....................................................................................................................................17
7.3 UNIT ENABLE...................................................................................................................................17
7.4 UNIT MODE SELECTION ....................................................................................................................17
7.5 UNIT CONTROL STATES ....................................................................................................................18
7.6 UNIT STATUS...................................................................................................................................19
7.7 ICE MODE START DELAY ..................................................................................................................19
7.8 EVAPORATOR PUMP CONTROL..........................................................................................................19
7.9 CONDENSER PUMP CONTROL ...........................................................................................................20
7.10 CONDENSATION CONTROL ................................................................................................................20
7.11 LEAVING WATER TEMPERATURE (LWT) RESET ..................................................................................22
7.12 UNIT CAPACITY CONTROL ................................................................................................................23
7.13 UNIT CAPACITY OVERRIDES ..............................................................................................................25
7.14 ENERGY SAVING MODE ....................................................................................................................26
7.15 DAIKIN ON SITE................................................................................................................................26
8 CIRCUIT FUNCTIONS ..........................................................................................................................27
8.1 CALCULATIONS ................................................................................................................................27
8.2 CIRCUIT CONTROL LOGIC .................................................................................................................28
8.3 CIRCUIT STATUS ..............................................................................................................................29
8.4 COMPRESSOR CONTROL ..................................................................................................................29
8.5 PRESSURE CONDENSATION CONTROL ................................................................................................31
8.6 EXV CONTROL ................................................................................................................................32
8.7 LIQUID INJECTION ............................................................................................................................33
9 SOFTWARE OPTIONS .........................................................................................................................34
9.2 INSERTING THE PASSWORD IN A SPARE CONTROLLER .........................................................................34
10 ALARMS AND EVENTS .......................................................................................................................36
10.1 ALARM LOGGING..............................................................................................................................36
10.2 SIGNALING ALARMS .........................................................................................................................36
10.3 CLEARING ALARMS ..........................................................................................................................36
10.4 UNIT RAPID STOP ALARMS ...............................................................................................................37
10.5 UNIT PUMPDOWN STOP ALARMS .......................................................................................................41
