Carel uRack

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CONTENTS

1 PRODUCT ...................................................................................................................................................................................................... 7

1.1 General functions ..............................................................................................................................................................................................7

1.2 Main characteristics ..........................................................................................................................................................................................7

2 USER INTERFACE .......................................................................................................................................................................................... 8

2.1 Buttons - LEDs - Icons ......................................................................................................................................................................................8

2.2 LED display and Icons ......................................................................................................................................................................................9

3 STARTING THE UNIT .................................................................................................................................................................................. 10

3.1 Starting for the first time ..................................................................................................................................................................................10

3.2 Unit configuration ............................................................................................................................................................................................10

3.3 Meaning of the inputs / outputs .......................................................................................................................................................................10

4 COMPRESSOR MANAGEMENT .................................................................................................................................................................. 13

4.1 General settings ..............................................................................................................................................................................................13

4.2 Compressor rotation .......................................................................................................................................................................................13

4.3 Compressor control .........................................................................................................................................................................................13

4.4 Number of compressors started with probe 1 fault .........................................................................................................................................14

4.5 Compressors with different capacities ............................................................................................................................................................15

4.6 Manually enable/disable the compressors ......................................................................................................................................................15

4.7 Special MT-LT units ........................................................................................................................................................................................16

4.8 Compressor time settings ...............................................................................................................................................................................16

5 FAN AND INVERTER MANAGEMENT ......................................................................................................................................................... 18

5.1 Fan management ............................................................................................................................................................................................18

5.2 Dead band control ...........................................................................................................................................................................................18

5.3 Inverter management ......................................................................................................................................................................................19

5.4 PWM-PPM management ................................................................................................................................................................................21

5.5 Floating condenser control ..............................................................................................................................................................................21

6 VARIOUS SETTINGS .................................................................................................................................................................................... 22

6.1 Manual device operation .................................................................................................................................................................................22

6.2 Compressor hour counter and maintenance alarm .........................................................................................................................................22

6.3 Set point variation from digital input ................................................................................................................................................................22

6.4 Type of refrigerant ...........................................................................................................................................................................................22

6.5 Auxiliary probe management ..........................................................................................................................................................................22

6.6 Prevent high discharge pressure ....................................................................................................................................................................23

7 ALARM MANAGEMENT .............................................................................................................................................................................. 24

7.1 Alarms with automatic reset ............................................................................................................................................................................24

7.2 Alarms with manual reset ................................................................................................................................................................................24

7.3 Semiautomatic alarms ....................................................................................................................................................................................24

7.4 Alarm relay ......................................................................................................................................................................................................24

7.5 Alarms from analogue inputs: temperature probe and pressure transducer: ..................................................................................................25

8 THE SUPERVISOR NETWORK ..................................................................................................................................................................... 26

8.1 Serial boards ...................................................................................................................................................................................................26

8.2 Communication protocols ...............................................................................................................................................................................26

9 USER INTERFACE ........................................................................................................................................................................................ 26

10 LIST OF PARAMETERS .............................................................................................................................................................................. 27

11 ON/OFF FAN CONTROL BOARD (CODE CONVONOFF0) .................................................................................................................... 32

12 PWM TO 0 TO 10 VDC (OR 4 TO 20 MA) CONVERSION BOARD FOR FANS (CODE CONV0/10A0) ................................................ 33

13 PROGRAMMING KEY (CODE PSOPZKEYA0) .......................................................................................................................................... 33

14 SUPERVISOR MANAGEMENT ................................................................................................................................................................... 33

15 DEFAULT CONFIGURATIONS .................................................................................................................................................................. 36

16 GLOSSARY ................................................................................................................................................................................................. 37

17 TECHNICAL SPECIFICATION .................................................................................................................................................................... 37

18 PRODUCT CODES LIST ............................................................................................................................................................................ 38