Carel IR32M Manual page 50

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
Ad Temperature alarm delay
DEFROST PARAMETERS
Ad Defrost has priority over compressor protection (0=no, 1=yes)
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:
To re-start correct operation a particular RESET procedure must be carried out:
•
switch off power supply to the unit;
•
while pressing the
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
•
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.
EE, EB or EE.
, switch on the unit (Note: RESET procedure returns all parameters to their
_C_
;
Type
C
Type
C
49
Min Max Unit
0 199 min
Min Max Unit
0 1 Flag
Cod. +030220151 - Rel. 2.1 - 04/09/98
Def
o
Def
1