Carel IR32M Manual page 43

PROBLEMS
compressor will not start :
•
power on
•
compressor LED flashing
temperature is outside set limits but
no alarm signalled and buzzer, if
fitted, does not sound
AL or Ad alarm signalled (Multi-
function input) without in fact being
active
alarm connected to Multi-function
input does not operate
defrost not activated :
•
power on
•
defrost LED off
defrost not activated:
•
power on
•
defrost LED flashing
manual defrost not activated and
defrost LED flashing
high temperature alarm given after
defrosting
display override remains even after
defrost
after changing a value, or
programming continues to work with
old values
cycle continuos is not actived
With the factory settings it can happen that within the 120 minutes delay set (Ad) the unit fails to
reach the range of +/- 10 degrees (AL and AH) around the set-point selected for the temperature
alarm. If this occurs we suggest to increase the delay, by changing parameter Ad.
CAUSE
•
compressor delay in operation if
A4=3
•
post-defrost dripping in progress
alarm delay operating
Multi-function input generates alarm
as power goes on
alarm delay operating or parameter
programming error
if H1=0
•
defrost cycle too short (dp)
•
interval between defrosting dl=0:
in this case defrost will not be
activated
if H1=1 end defrost temperature is
too low. Suggest checking defrost
sensor and temperature reading on
evaporator (parameter d/)
compressor protection delays
operating
alarm delay after defrost too short or
alarm threshold too low
ambient temperature has not yet
reached value set, or time d8 has not
yet elapsed
unit has not yet updated of re-start
unit, parameters has not been
satisfactorily completed, pressing
it is necessary to press
.
42
parameters c0, c1, c2 and dd
check Ad
check connection of input and
whether it is off in normal operation
see whether A4=1 or A4=2;
if A4=1 check state of digital input;
if a4=2 check A7
parameter dp and dl
parameter dt and d/ defrost sensor
parameter d9
(select d9=1, see instructions)
parameters d8 and AH
wait or reduce d8
switch off and parameter, control or
programme again correctly
see note on page 8
before
Cod. +030220151 - Rel. 2.1 - 04/09/98
CHECK