To Next Page

To Previous Page

Cod. +030220151 - Rel. 2.1 - 04/09/98

NOTES FOR CONTROLS WITH SERIAL NUMBERS BELOW 5,000

If the unit has a serial number lower than 5000 (see serial number on the label placed on the back of the

unit), the factory settings of two parameters will differ from other units:

ALARM PARAMETERS Type Min Max Unit Def

Ad Temperature alarm delay C 0 199 min o

DEFROST PARAMETERS Type Min Max Unit Def

Ad Defrost has priority over compressor protection (0=no, 1=yes) C 0 1 Flag 1

In addition, whenever type C parameters are accessed (via the keypad or via remote commander), the unit

displays the parameter /0.

As indicated in the description of the sensor parameters, this parameter can only be modified in exceptional

situations.

Finally, these units have a different reset procedure from that described previously. This is as follows:

Reset procedure for units with serial number below 5000.

In very exceptional operating situations (strong interference impulses of electromagnetic origin), the unit may

reveal errors in its internal memorisation of data. These errors can affect the correct operation of the unit. If

the microprocessor identifies an error in data memorisation, the display will show one of the following:

EE, EB or EE.

To re-start correct operation a particular RESET procedure must be carried out:

• switch off power supply to the unit;

• while pressing the , switch on the unit (Note: RESET procedure returns all parameters to their

default state. Thus any changes made to the working parameters will be lost. In particular, if using a unit

designed for PTC sensor, it is necessary to reprogram the correct value for parameter /0, i.e. /0=1).

• the display will read _C_;

• after a few seconds the unit will begin normal operation.

If the error indicator EE should persist, press the def button to remove the indication. If the error EE persists

further, it will be necessary to replace the unit. If the indication disappears it is possible to continue using the

unit. However, it is wise to have the control checked as soon as possible, since its original accuracy may not

be maintained.

Carel IR32C User Manual

Questions and Answers: