What To Do If The Ir32P Or Ir32C, Irdrc Fails To Work - Carel IR32M Manual

What to do if the IR32P or IR32C, IRDRC fails to work

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 flashing
manual defrost not activated and
defrost LED flashing
high temperature alarm given after
defrosting
after changing a value, or programming
continues to work with old values
display override remains even after
defrost
•
fans do not start
•
fan power on
•
compressor LED flashing
•
fan LED flashing
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 operating
•
post-defrost dripping in
progress
alarm delay operating
Multi-function input generates
alarm as power goes on
alarm delay operating or parameter
programming error
end defrost temperature 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
unit has not yet updated of re-start
unit, parameters has not been
satisfactorily completed, pressing
ambient temperature has not yet
reached value set, or time d8 has
not yet elapsed
•
compressor and fan delay
selected
•
if F0=1 (fans under fan
controller)
•
evaporator is warm:
temperature can be read by
selecting parameter /d
•
dripping is in progress
•
delta (F1) selected is too high
•
a post dripping delay is
operating
•
if F0=0
•
F2=1 and compressor off
•
dripping is in progress
•
closing down after dripping
it is necessary to press
before "aux" Button.
43
CHECK
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 dt and d/ defrost sensor
parameter d9
(select d9=1, see instructions)
parameters d8 and AH
switch off and parameter, control
or programme again correctly
wait or reduce d8
check c0
parameters F0, F1, FD, dd and d/
parameters F0, F2, dd and Fd
see note on page 8
button
Cod. +030220151 - Rel. 2.1 - 04/09/98