Carel IR32C

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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:

B
brooksbarbaraAug 17, 2025
What to do if Carel IR32C Controller shows E0 FLASHING control sensor error?
- K
  Katie WallsAug 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.
Z
zhortonAug 22, 2025
Why is my Carel Controller HI FLASHING high temperature alarm?
- T
  Tammy FarmerAug 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.
K
Kimberly BowmanAug 25, 2025
What does it mean when my Carel IR32C shows LO FLASHING low temperature alarm?
- W
  wanda86Aug 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.
S
Sharon SimsAug 27, 2025
What to do if Carel IR32C Controller Ed FLASHING defrost stopped due to expiry of the maximum time?
- L
  laura67Aug 27, 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.
W
Wendy SchmittAug 30, 2025
Why Carel Controller temperature is outside set limits but no alarm is signalled?
- J
  josephcunninghamAug 30, 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.
R
ronaldtaylorSep 2, 2025
How to troubleshoot Carel IR32C Controller when compressor will not start and compressor LED is flashing?
- B
  brandijohnsonSep 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.
T
timothy27Sep 4, 2025
Why is Carel Controller defrost not activated and defrost LED is off?
- J
  James HancockSep 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.
D
Dawn NguyenSep 7, 2025
What to do if manual defrost is not activated and defrost LED is flashing on Carel IR32C Controller?
- N
  Nancy Richards MDSep 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).
J
james01Sep 10, 2025
How to fix Carel Controller E1 FLASHING evaporator sensor error?
- K
  kyle52Sep 12, 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.
Q
qjenningsSep 10, 2025
Why is Carel IR32C Controller signalling AL or Ad alarm without being active?
- R
  Robert WoodsSep 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.

Carel IR32C Specifications

General

Series	IR32
Operating Temperature	-10 to 60 °C
Front Panel Protection	IP65
Type	Controller
Application	HVAC
Power Supply	24 VAC/VDC
Communication	Modbus RTU
Display	LCD
Programming	Via PC software
Protection Rating	IP20
Mounting	DIN Rail
Storage Temperature	-20°C to +70°C

Summary

General Features

Models Available

Lists and briefly describes the available Infrared series models.

Infrared Series Key Features

Details power supply, keypad, display, buzzer, remote control, and other key features.

Front Panel, Keys, and Installation

Front Panel Layout, Indicators, and Keypad

Describes the display, indicators, and button functions on the controller's front panel.

Installation and Safety Cautions

Covers standard configuration, installation steps, and critical safety precautions.

Parameter Management and Modification

Main Working Parameters and Modification

Details setting, modifying, and resetting operational parameters for customization.

Reset Procedure

Details the steps for resetting the controller to factory default settings.

Remote Control System

Remote Control Unit Operation and Access

Explains remote control features, operation, and access control for parameter management.

Parameter Categories and Details

Sensor, Regulation, Compressor, Defrost Parameters

Covers sensor, regulation, compressor, and defrost parameter groups.

Alarm, Fan, and Other Settings

Covers alarm, fan, and other miscellaneous parameter groups.

Wiring Diagrams and Operation

Unit Wiring Diagrams

Visual guides for connecting multiple units and panel mounting configurations.

Operating States, Phases, and Alarms

Explains system status, operating phases, alarm signals, and troubleshooting.

Technical Characteristics and Ordering

Model Specifications, Dimensions, and Ordering Codes

Detailed specs, dimensions, and part numbers for purchasing controllers and sensors.

IR96 Controller Specifics

IR96 Features, Functions, and Parameters

Details new functions, features, and parameter settings specific to the IR96 model.

IR96 Operation and Maintenance

Covers IR96 technical features, connections, button operations, and parameter settings.

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