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Master Controller 2.0v24 Reverse Cycle Defrost System Installation & Operations Manual An Electronic Microprocesso

10Sequences of Operation START UP When power is applied to the board, the controller closes the valve. The controller will display ‘STUP’ on its fo

11If the suction pressure is above the maximum operating pressure set point (MOP), the valve will modulate to control the pressure at

12Demand Defrost When “DINM” = “DEMD” and ‘DFPD’ is set to ‘0’, the controller will initiate a demand defrost. The controller will not go to ‘DEFR

13o Defrost Mode  If this alarm and defrost term temp sensor alarm, reverse cycel defrost will last only three minutes with valve open;  If

14 BOND CONTROLLERS FROM FRONT PANEL • Connect to Ethernet switch or router only the controllers that you want to bond. • On any controller, using

15Definition of On-Board Symbols STATUS, DEFAULT AND READING DISPLAY When the on-board green light is on, the compressor relay is energized. When

16TYPICAL SET POINTS FOR AMC CONTROLLER 2.0 SETPOINT [email protected] Air/Electric Defrost Reverse Cycle Defrost “STPT” DESCRIPTIONS

17ALARM DISPLAY Any alarm will cause alarm relay to switch. All alarms have a distinct display shown on the four-digit display on the controller. Th

18 MANUAL VALVE Press the right or left button until ‘MNMD’ (Manual Mode) is displayed. Press the ‘ENTER’ button. If ‘PSWD’ (Password) is displaye

19SUCTION LINETEMP SENSORFAN DELAYPRESSURETRANSDUCERDEFROST TERMINATIONTEMP SENSOR6" TO 10"EVAP OUTTemperature Sensors The application r

2 IMPORTANT NOTICES • Read this manual before installing your Master Controller 2.0 system. Keep the manual and refer to it before doi

20Chart A. Temperature/Resistance Characteristics (-50 to 80 oF) Temp. oF Temp. oC ohms*1k Temp. oF Temp. oC ohms*1k -50 -45.6

21Charging the Master Controller 2.0 Refrigeration System Note: If you are a first time installer of a Master Controller 2.0 system, please call Ma

22The recommended charging procedures are: (1) Charge the system by weighing exact amount of refrigerant specified by Master-Bilt for the unit. Or,

23REVERSE CYCLE DEFROST General Information Master-Bilt’s patented (U.S. patent no. 7,073,344) reverse cycle defrost is a standard feature on Mast

24Eliminated Parts The Master-Bilt Reverse cycle’s unique technology, coupled with the bi-flow electric expansion valve, eliminates the need for: •

25TYPICAL WIRING DIAGRAM (AIR DEFROST) N.O.

26TYPICAL WIRING DIAGRAM (REVERSE CYCLE DEFROST) N.O.

27TYPICAL WIRING DIAGRAM (ELECTRIC DEFROST) Note: For feature configuration, please refer to the wiring diagram in the actaul system for instal

28TROUBLESHOOTING GUIDE. Trouble, Alarm Codes Causes Corrective Actions Pressure transducer alarm PRSA • Bad transducer • Out of range • Loose w

29Troubleshooting the Electric Expansion Valve If the valve stops moving, depending upon how far open it is, one or more alarms may be displayed. T

3TABLE OF CONTENTS INTRODUCTION ... 4

30 908 Highway 15 North New Albany, MS 38652 Service Dept. phone: 800-684-8988 Fax: 866-882-7629 Email: service@mas

4INTRODUCTION Thank you for purchasing a Master-Bilt Master Controller 2.0 for Electric or Reverse Cycle Defrost system. This manual contains impor

5WARNING LABELS AND SAFETY INSTRUCTIONS This is the safety-alert symbol. When you see this symbol, be alert to the potential for personal injury o

6MASTER CONTROLLER Description The Master Controller 2.0 is a custom-designed microprocessor-based electronic controller for Master-Bi

7 • SEI or SER Terminals. Sporlan SEI and SER type electric expansion valves are currently used for all applications. There are 1596 nomi

8PressureT1 T2T3TransducerValveElectricLiquid LineEvaporatorDefrost Temp. SensorEvap Coil In/DistributorRoom Temp SensorTemp SensorEvap out / Fan Del

9Features • One of the most energy-saving features of the Master Controller 2.0 Reverse Cycle Defrost system is free floating head pressure. A hea