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Carel IR96 - User Manual

Carel IR96
63 pages
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CONTENTS
General features . . . . . 1
Models available . . . . . 1
Main features of the Infrared Series . . . . 2
Front panel and buttons . . . . . 4
LED display - Indicators . . . . . 4
Keypad . . . . . 5
Installation . . . . . 6
Standard configuration . . . . . 6
Cautions . . . . . 7
Selection of the main working parameters - Other important parameters . . . 8
List of the working parameters to be checked before starting the unit . . . 9
How to modify the working parameters . . . . 10
Gaining access - How to modify the parameters . . . . 10
How to exit the procedure - How to exit the procedure without memorizing the modified data . . 10
Reset procedure . . . . . 11
Remote control unit . . . . . 12
Technical specifications - Keypad description . . . . 12
Buttons used to activate/deactivate the use of the remote control unit . . . 12
Buttons used to modify the main parameters (directly accessible buttons) . . . 13
Buttons for the remote control of the IR instruments . . . . 13
How to use the remote control unit . . . . 13
Access without code . . . . . 13
Access with code . . . . . 14
Further information . . . . . 15
Configuration parameters - The password . . . . 15
/ = parameters for the management of the temperature sensors . . . 16
r = parameters for the temperature regulation . . . . 18
c = parameters for the compressor management . . . . 19
d = parameters for the defrost management . . . . 21
A = parameters for the alarm control . . . . 24
F = parameters for controlling evaporator fans . . . . 28
Summary diagram of the evaporator fan operation . . . . 29
Notes for the new release . . . . . 31
Wiring diagrams . . . . . 34
Wiring diagram for multiple units - IR32 panel mounting connections . . . 34
Operating states of the equipment . . . . 38
Sequence of main phases . . . . . 38
Alarms and troubleshooting . . . . . 39
What to do if the IR32S, IRDRSE/S0 fails to work . . . . 41
What to do if the IR32Y fails to work . . . . 41
What to do if the IR32P or IR32C, IRDRC fails to work . . . 43
Technical characteristics . . . . . 44
Temperature/resistance ratios for NTC thermistors. . . . 48
IR32 dimensions . . . . . 50
Code numbers for ordering controls and accessories . . . 51
IR96: microprocessor-based freezer controller . . . . 53
New functions . . . . . 53
Technical features -- Connections . . . . 55
Ir96: keys functioning . . . . . 56
Functioning . . . . . 56
IR96: parameters . . . . . 58
Parameters modification . . . . . 58
New-set values memorisation . . . . . 58
List of parameters . . . . . 59
Description of particular parameters and performances . . . 61
Memorisation of minimum/maximum temperature . . . . 61
Functioning of the relay 4 . . . . . 61
Type of sensor - Digital Inputs Configuration . . . . 61
IR96: alarms . . . . . 62
Dimensions . . . . . 62

Table of Contents

Questions and Answers

  • C
    Cory AtkinsAug 17, 2025
    What to do if Carel IR96 shows E0 FLASHING control sensor error?
    • J
      jason29Aug 17, 2025
      If the Carel Controller displays 'E0 FLASHING', indicating a control sensor error, it could be due to a non-working sensor because of signal interruption, a short-circuit, or the sensor not being compatible with the equipment. Also, the parameter /0 might not correspond to the unit's hardware setup. Check parameter /0 to ensure it corresponds to the unit's hardware setup.
  • J
    joneserikaAug 20, 2025
    How to fix Carel IR96 Controller E1 FLASHING evaporator sensor error?
    • C
      Cynthia KnightAug 20, 2025
      If the Carel Controller displays 'E1 FLASHING', which indicates an evaporator sensor error, it may be caused by a sensor not working due to signal interruption, a short circuit, or the sensor being incompatible with the equipment. It may also be that parameter /0 does not correspond to the unit's hardware setup. To resolve this, check parameter /0 to ensure it corresponds to the unit's hardware setup.
  • E
    elizabeth35Aug 22, 2025
    Why is my Carel IR96 Controller HI FLASHING high temperature alarm?
    • M
      monica56Aug 22, 2025
      If the Carel Controller shows 'HI FLASHING', indicating a high-temperature alarm, it means the sensor has registered a temperature higher than the set value, exceeding the parameter AH. To address this, check the parameters AH, Ad, and A0.
  • A
    Anthony MartinAug 26, 2025
    What does it mean when my Carel Controller shows LO FLASHING low temperature alarm?
    • D
      Douglas EricksonAug 26, 2025
      When the Carel Controller displays 'LO FLASHING', signaling a low temperature alarm, it means the sensor has registered a temperature lower than the set value, falling below the parameter AL. To resolve this, check the parameters AL, Ad, and A0.
  • C
    Cody SmithAug 28, 2025
    What to do if Carel IR96 Ed FLASHING defrost stopped due to expiry of the maximum time?
    • H
      Henry BassAug 28, 2025
      If the Carel Controller displays 'Ed FLASHING', indicating that the last defrost stopped because the maximum time expired, check parameters dt, dP, and d4. Also, check the effectiveness of the defrost. If the next defrost ends on temperature, the signal will disappear automatically.
  • K
    kbarrettAug 31, 2025
    Why Carel Controller temperature is outside set limits but no alarm is signalled?
    • M
      martineztyroneAug 31, 2025
      If the temperature is outside the set limits, but no alarm is signaled on the Carel Controller, it may be due to the alarm delay operating. To solve this, check Ad.
  • H
    Holly WebbSep 2, 2025
    How to troubleshoot Carel Controller when compressor will not start and compressor LED is flashing?
    • G
      grantrachelSep 2, 2025
      If the compressor won't start and the compressor LED is flashing on the Carel Controller, it could be due to the compressor delay operating. To address this, review parameters c0, c1, and c2.
  • V
    Vincent ReyesSep 5, 2025
    Why is Carel IR96 Controller defrost not activated and defrost LED is off?
    • L
      Lisa CollierSep 5, 2025
      If the defrost is not activated and the defrost LED is off on the Carel Controller, and if H1=0, it could be because the defrost cycle is too short (dp) or the interval between defrosting dl=0. To solve this, check parameters dP and dl.
  • K
    kmillsSep 7, 2025
    What to do if manual defrost is not activated and defrost LED is flashing on Carel IR96?
    • W
      Willie PhillipsSep 8, 2025
      If the manual defrost is not activated and the defrost LED is flashing on the Carel Controller, it might be due to compressor protection delays operating. To resolve this, check parameter d9 (select d9=1, see instructions).
  • E
    eric65Sep 12, 2025
    Why is Carel Controller signalling AL or Ad alarm without being active?
    • L
      Lisa BuchananSep 12, 2025
      If the Carel Controller signals an AL or Ad alarm (Multi-function input) without it actually being active, it may be because the multi-function input generates an alarm as power goes on. To fix this, check the connection of the input and ensure it is off during normal operation.

Summary

Front Panel and Keys

Keypad

Details the functions of the front panel buttons (aux, PRG/mute, SEL, def).

Installation

Installation

Step-by-step guide for inserting and fastening the instrument into a panel.

Connection

Instructions for electrical connections, sensors, and power supply.

Cautions

Important warnings regarding installation circumstances and electrical connection precautions.

Selection of the Main Working Parameters

Setting the Main Working Parameters - Ambient Set-point

How to set the ambient set-point and confirm the new value.

Setting the Differential (Hysteresis of the Regulator)

How to adjust the differential (hysteresis) for temperature regulation.

Defrost Parameters

Defrost Parameters

Lists and explains parameters related to defrosting (dI, dP, d0, dt).

List of the Working Parameters to be Checked Before Starting the Unit

How to Modify the Working Parameters

Gaining Access

Instructions for accessing 'F' and 'C' parameter groups using keypad.

How to Modify the Parameters

Step-by-step guide for changing parameter values using the keypad.

How to Exit the Procedure

Procedures for memorizing or discarding modified parameter values.

Reset Procedure

Remote Control Unit

How to Use the Remote Control Unit

Access Without Code

Steps to enable transmission and modify parameters without an access code.

Access with Code

Steps to enable transmission using a specific access code.

How to Select the Access Code

Guide to setting and removing remote control access codes using H3 parameter.

Further Information

The Password

Details how to access 'C' parameters using a password (22).

; = Parameters for the Management of the Temperature Sensors

;0: Type of Sensor

How to select NTC or PTC sensor type and factory settings.

;C: Calibration Offset

;C: Calibration Offset

How to adjust the displayed temperature for calibration.

r = Parameters for the Temperature Regulation

Regulation Parameters

Lists and describes regulation parameters (rd, r1, r2, r3).

rd: Regulation Delta

Setting the differential (hysteresis) for temperature regulation.

c = Parameters for the Compressor Management

c0: Delay in Switching On Compressor and Fans

Sets delay before compressor starts after equipment power-on.

c1: Minimum Time Between Two Start-ups of Compressor

Minimum interval between compressor start-ups.

c2: Minimum Compressor Down-Time

Minimum time the compressor must remain inactive.

c3: Minimum Compressor Operating Time

c3: Minimum Compressor Operating Time

Minimum period the compressor must operate.

c4: Duty Setting or Safety Relay

Controls compressor operation during sensor faults.

cc: Duration of the Continuous Cycle

c6: Alarm Cut-out After Continuous Cycle Operation

d = Parameters for the Defrost Management

Defrosting Parameters

Lists and describes defrost parameters (d0, dl, dt, dP).

d0: Type of Defrosting

Selects between resistance or hot gas defrosting.

dl: Interval Between Two Defrost Cycles

Sets the time interval between consecutive defrost cycles.

dt: SETPOINT for Temperature at End of Defrost

dP: Maximum Duration of Defrosting

A = Parameters for the Alarm Control

A0: Alarm and Fan Differentials

AL: Minimum Temperature Alarm

AH: High Temperature Alarm

Ad: Temperature Alarm Delay

Ad: Temperature Alarm Delay

A4: Configuration of Multi-function Digital Input

Defines the effect of the multi-function digital input based on parameter A4 values.

A4=5: Door Switch

A4=5: Door Switch

A4=3: Direct;Reverse Operation

A4=4: Initiation of Defrosting by External Contact

F = Parameters for Controlling Evaporator Fans

F0: Fans Controlled by Fan Controller

F1: Fan Cut-out Temperature

F2: Stop Fans When Compressor Idle

IR96: Microprocessor-Based Freezer Controller for Medium or Low Temperature Range Forced Air Units

New Functions

Min-Max Temperature Data Logging

Defrost Duration also ‘By Time’

Interval Between Defrosts

New Algo for Door-Switch Management

Smart On;Off Button

IR96 New Functions: -50°C and New Algo for Calibration

Operating States of the Equipment

Operating States of the Equipment

Sequence of Main Phases

Alarms and Troubleshooting

Defective or Incorrect Operation

How the microprocessor signals malfunctions and related actions.

Description of the Main Alarm Signals

Explains common alarm signals (E0, E1, AI, Ad, LO, HI, EA/EB/EE, Ed, dF).

HI FLASHING: High Temperature Alarm

Explains the high temperature alarm indication and checks.

EA, EB, EE: Data Acquisition Error. RESET PROCEDURE

Describes data acquisition errors and the reset procedure.

Ed FLASHING: Defrost End by Timeout

Explains defrost end by timeout errors and checks.

What to Do If the Remote Commander Does Not Work

Troubleshooting steps for a non-functional remote control.

What to Do If the IR32 S, IRDRSE;S0 Fails to Work

Troubleshooting guide for IR32S, IRDRSE/S0 models.

What to Do If the IR32 Y Fails to Work

Troubleshooting guide for IR32Y models.

What to Do If the IR32 P or IR32 C, IRDRC Fails to Work

Troubleshooting guide for IR32P, IR32C, IRDRC models.

Technical Characteristics

Summary of All the Parameters

Sensor Parameters

Table summarizing sensor parameters (/0 to /6).

Control Parameters

Table summarizing control parameters (rd, r1, r2, r3).

Compressor Parameters

Table summarizing compressor parameters (c0 to c6).

Defrost Parameters

Table summarizing defrost parameters (d0 to dC).

Notes for Controls with Serial Numbers Below 5,000

Reset Procedure for Units with Serial Number Below 5000

Specific reset procedure for units with serial numbers below 5000.

Code Numbers for Ordering Controls and Accessories

IR96: Buttons Functioning

Set-Point:

Manual Defrosting:

Continuous Cycle:

IR96: Parameters

First Level:

Accessing frequent parameters without a password.

Second Level:

Accessing configuration parameters requires a password.

Parameters Modification:

Step-by-step process for modifying parameter values.

New-Set Values Memorisation:

How to save modified parameter values and exit.

List of Parameters

Alarm Parameters

Table summarizing alarm parameters (A0-A7).

Fan Parameters

Table summarizing fan parameters (F0-Fd).

Description of Particular Parameters and Performances

Memorisation of Minimum;Maximum Temperature:

Functioning of the Relay 4

Selection of Duty Setting (Parameters A6 and C4)

IR96: Alarms

Carel IR96 Specifications

General IconGeneral
BrandCarel
ModelIR96
CategoryController
LanguageEnglish

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