PENN TC3B21 Defrost Controller
Product Information
The TC3B21 is a basic controller for refrigerated cabinets that features energy-saving strategies. This reference guide provides configuration parameters for the controller.
Configuration Parameters
The following parameters can be configured:
| Parameter | Description |
|---|---|
| PAR. SP | Display refresh time CONTROL Setpoint differential Minimum setpoint Maximum setpoint Setpoint offset in energy saving Cooling or heating operation |
| PAR. CA1 CA2 P0 P1 P2 P4 P5 P8 | Various configuration parameters |
| r0 r1 r2 r4 r5 r12 | Various configuration parameters |
| PAR. DEF. COMPRESSOR | Compressor off minimum time Compressor on minimum time Compressor off time during cabinet probe alarm Compressor on time during cabinet probe alarm Threshold for high condenser temperature warning Threshold for high condenser temperature alarm High condenser temperature alarm delay DEFROST (if r5 = 0) Automatic defrost interval Threshold for defrost end Defrost duration Enable defrost at power-on Defrost delay after power-on Value displayed during defrost Dripping time Defrost interval counting mode Evaporation threshold for automatic defrost interval counting Enable defrost timeout alarm Adaptive defrost interval Threshold for adaptive defrost, relative to optimal evaporation temperature Compressor on consecutive time for defrost Evaporation threshold for adaptive defrost interval counting, relative to optimal evaporation temperature |
| PAR. A1 A4 A6 A7 A11 | Various configuration parameters |
| PAR. HE2 HE3 | Digital inputs – Door switch or multi-purpose input function, Open door alarm delay, Regulation inhibition maximum time with door open |
Product Usage Instructions
Refer to the product manual and follow the configuration parameters to configure the TC3B21 defrost controller for your refrigerated cabinet. The controller features energy-saving strategies and can be configured for cooling or heating operation. The controller also features automatic defrost, defrost delay after power-on, and defrost duration.
The digital inputs can be used for door switches or multi-purpose input functions and feature an open door alarm delay and regulation inhibition maximum time with door open.
CONFIGURATION PARAMETERS
 | PAR. | DEF. | SETPOINT | MIN. – MAX. |
| SP | 0.0 | Setpoint | r1 to r2 | |
| PAR. | DEF. | ANALOG INPUTS | MIN. – MAX. |
| CA1 | 0.0 | Cabinet probe offset | -25°C/°F to 25°C/°F | |
| CA2 | 0.0 | Auxiliary probe offset | -25°C/°F to 25°C/°F | |
| P0 | 1 | Probe type | 0 = n/a 1 = NTC | |
| P1 | 1 | Enable °C decimal point | 0 = No 1 = Yes | |
| P2 | 0 | Temperature unit of measurement | 0 = °C 1 = °F | |
| P4 | 0 | Configurable input function | 0 = Door switch/multi-pur- pose input 1 = Evaporator probe 2 = Condenser probe | |
| P5 | 0 | Value displayed | 0 = Cabinet temperature 1 = Setpoint 2 = Auxiliary temperature | |
| P8 | 5 | Display refresh time | 0 s to 250 s : 10 | |
 | PAR. | DEF. | CONTROL | MIN. – MAX. |
| r0 | 2.0 | Setpoint differential | 1°C/°F to 15°C/°F | |
| r1 | –40 | Minimum setpoint | -99°C/°F to r2 | |
| r2 | 50.0 | Maximum setpoint | r1 to 199°C/°F | |
| r4 | 0.0 | Setpoint offset in energy saving | 0°C/°F to 99°C/°F | |
| r5 | 0 | Cooling or heating operation | 0 = Cooling 1 = Heating | |
| r12 | 1 | Position of the r0 differential | 0 = Asymmetric 1 = Symmetric | |
 | PAR. | DEF. | COMPRESSOR | MIN. – MAX. |
| C0 | 0 | Compressor on delay after power-on | 0 min to 240 min | |
| C2 | 3 | Compressor off minimum time | 0 min to 240 min | |
| C3 | 0 | Compressor on minimum time | 0 s to 240 s | |
| C4 | 0 | Compressor off time during cabinet probe alarm | 0 min to 240 min | |
| C5 | 10 | Compressor on time during cabinet probe alarm | 0 min to 240 min | |
| C6 | 80.0 | Threshold for high condenser temperature warning | 0°C/°F to 199°C/°F Differential = 2°C/4°F | |
| C7 | 90.0 | Threshold for high condenser temperature alarm | 0°C/°F to 199°C/°F | |
| C8 | 1 | High condenser temperature alarm delay | 0 min to 15 min | |
 | PAR. | DEF. | DEFROST (if r5 = 0) | MIN. – MAX. |
| d0 | 8 | Automatic defrost interval | 0 h to 99 h 0 = Only manual If d8 = 3, maximum interval | |
| d2 | 2.0 | Threshold for defrost end | -99°C/°F to 99°C/°F | |
| d3 | 30 | Defrost duration | 0 min to 99 min If P4 = 1, maximum duration | |
| d4 | 0 | Enable defrost at power-on | 0 = No 1 = Yes | |
| d5 | 0 | Defrost delay after power-on | 0 min to 99 min | |
| d6 | 1 | Value displayed during defrost | 0 = Cabinet temperature 1 = Display locked 2 = dEF label | |
| d7 | 2 | Dripping time | 0 min to 15 min | |
| d8 | 0 | Defrost interval counting mode | 0 = Device on hours 1 = Compressor on hours 2 = Hours evaporator temperature < d9 3 = Adaptive | |
| d9 | 0.0 | Evaporation threshold for automatic defrost interval counting | -99°C/°F to 99°C/°F | |
| d11 | 0 | Enable defrost timeout alarm | 0 = No 1 = Yes | |
| d18 | 40 | Adaptive defrost interval | 0 min to 999 min If compressor on and evaporator temperature < d22 0 = Only manual | |
| d19 | 3.0 | Threshold for adaptive defrost, relative to optimal evaporation temperature | 0°C/°F to 40°C/°F Optimal evaporation temperature – d19 | |
| d20 | 180 | Compressor on consecutive time for defrost | 0 min to 999 min 0 = Disabled | |
| d22 | 2.0 | Evaporation threshold for adaptive defrost interval counting, relative to optimal evaporation temperature | 0°C/°F to 19°C/°F Optimal evaporation temperature + d22 | |
 | PAR. | DEF. | ALARMS | MIN. – MAX. |
| A1 | 10.0 | Threshold for low temperature alarm (relative to setpoint) | 0°C/°F to 99°C/°F SP – A1 0 = Disabled | |
| A4 | 10.0 | Threshold for high temperature alarm (relative to setpoint) | 0°C/°F to 99°C/°F SP + A4 0 = Disabled | |
| A6 | 12 | High temperature alarm delay after power-on | 0 min to 99 min x 10 | |
| A7 | 15 | High and low temperature alarms delay | 0 min to 240 min | |
| A11 | 2.0 | High and low temperature alarms reset differential | 1°C/°F to 15°C/°F |
 | PAR. | DEF. | DIGITAL INPUTS | MIN. – MAX. |
| i0 | 1 | Door switch or multi-purpose input function | 0 = None 1 = Compressor off 2 = Energy saving 3 = iA alarm 4 = iA alarm + compressor off | |
| i1 | 0 | Door switch or multi-purpose input activation | 0 = With contact closed 1 = With contact open | |
| i2 | 30 | Open door alarm delay | -1 min to 120 min If i0 = 3, multi-purpose input alarm delay If i0 = 4, compressor on delay after alarm reset -1 = Disabled | |
| i3 | 15 | Regulation inhibition maximum time with door open | -1 min to 120 min -1 = Until the closing | |
| i10 | 0 | Door closed consecutive time for energy saving | 0 min to 999 min After regulation temperature < SP 0 = Disabled | |
| i13 | 180 | Number of door openings for defrost | 0 to 240 0 = Disabled | |
| i14 | 32 | Door open consecutive time for defrost | 0 min to 240 min 0 = Disabled | |
 | PAR. | DEF. | ENERGY SAVING (if r5 = 0) | MIN. – MAX. |
| HE2 | 0 | Energy saving maximum duration | 0 min to 999 min 0 = Until the door opening | |
| HE3 | 2 | No operation on the keyboard consecutive time for low consumption | 0 min to 240 min 0 = Disabled | |
 | PAR. | DEF. | SAFETIES | MIN. – MAX. |
| POF | 1 | Enable ON/STAND-BY key | 0 = No 1 = Yes | |
| PAS | –19 | Password | -99 to 999 0 = Disabled |
PRODUCT WARRANTY
This product is covered by a limited warranty, details of which can be found at www.johnsoncontrols.com/buildingswarranty.
SOFTWARE TERMS
Use of the software that is in (or constitutes) this product, or access to the cloud, or hosted services applicable to this product, if any, is subject to applicable end-user license, opensource software information, and other terms set forth at www.johnsoncontrols.com/techterms. Your use of this product constitutes an agreement to such terms.
SINGLE POINT OF CONTACT
| APAC | Europe | NA/SA |
| JOHNSON CONTROLS C/O CONTROLS PRODUCT MANAGEMENT NO. 32 CHANGJIJANG RD NEW DISTRICT WUXI JIANGSU PROVINCE 214028 CHINA | JOHNSON CONTROLS WESTENDHOF 3 45143 ESSEN GERMANY | JOHNSON CONTROLS 507 E MICHIGAN ST MILWAUKEE WI 53202 USA |
CONTACT INFORMATION
Contact your local branch office:
www.johnsoncontrols.com/locations.
Contact Johnson Controls:
www.johnsoncontrols.com/contact-us.
This document and the solutions contained therein are the intellectual property of Penn and thus protected by the Italian Intellectual Property Rights Code (CPI). Penn imposes an absolute ban on the full or partial reproduction and disclosure of the content other than with the express approval of Penn. The customer (manufacturer, installer or end-user) assumes all responsibility for the configuration of the device. Penn accepts no liability for any possible errors in this document and reserves the right to make any changes, at any time without prejudice to the essential functional and safety features of the equipment.
Johnson Controls
507 E. Michigan St. Milwaukee, WI 53202-5211 USA
www.penncontrols.com.
johnsoncontrols.com/buildingswarranty
PENN
