Carel IR32C User Manual

Cod. +030220151 - Rel. 2.1 - 04/09/98
43
What to do if the IR32P or IR32C, IRDRC fails to work
PROBLEMS CAUSE CHECK
compressor will not start :
• power on
• compressor LED flashing
• compressor delay in operating
• post-defrost dripping in
progress
parameters c0, c1, c2 and dd
temperature is outside set limits but no
alarm signalled and buzzer, if fitted,
does not sound
alarm delay operating check Ad
AL or Ad alarm signalled (Multi-function
input) without in fact being active
Multi-function input generates
alarm as power goes on
check connection of input and
whether it is off in normal
operation
alarm connected to Multi-function input
does not operate
alarm delay operating or parameter
programming error
see whether A4=1 or A4=2;
if A4=1 check state of digital input;
if A4=2 check A7
defrost not activated:
• power on
• defrost LED flashing
end defrost temperature too low.
Suggest checking defrost sensor
and temperature reading on
evaporator (parameter /d)
parameter dt and d/ defrost sensor
manual defrost not activated and
defrost LED flashing
compressor protection delays
operating
parameter d9
(select d9=1, see instructions)
high temperature alarm given after
defrosting
alarm delay after defrost too short
or alarm threshold too low
parameters d8 and AH
after changing a value, or programming
continues to work with old values
unit has not yet updated of re-start
unit, parameters has not been
satisfactorily completed, pressing
switch off and parameter, control
or programme again correctly
display override remains even after
defrost
ambient temperature has not yet
reached value set, or time d8 has
not yet elapsed
wait or reduce d8
• fans do not start
• fan power on
• compressor LED flashing
• fan LED flashing
• 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
check c0
parameters F0, F1, FD, dd and d/
parameters F0, F2, dd and Fd
cycle continuos is not actived
it is necessary to press button
before "aux" Button.
see note on page 8
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.

Carel IR32C Specifications

General

Brand	Carel
Model	IR32C
Category	Controller
Language	English