Carel easy, Руководство пользователя

Страница: 28 / 32

28
GB
easy/easy compact +030220791 - rel. 2.0 - 30.05.2007
5.9 Troubleshooting
The following table shows a number of anomalous situations that may
occur on the various models.
The most frequent causes and corresponding checks are described:
problem cause checks
the compressor does not start (signalled by the
compressor LED fl ashing) compressor delay setdefrost post
dripping in progress •
• parameters c0, c1 and c2 and dd
the temperature is over the set limits but there is
no alarm message and the buzzer, if fi tted, does not
sound alarm delay set parameters Ad, c6, d8
alarm IA is signalled (multifunction input) without
actually being active the multifunction input generates an alarm when
the contact opens connection of the input and whether this is closed in
normal operation
the alarm connected to the multifunction input is
not detected alarm delay set or parameter programming error if A4=1
the status of digital input A7 1.
2.
the defrost is not activated defrost duration too short (dP)
interval between defrosts dI=0: in this case the
defrost is not activated •
• parameters dP and dI and H1 for S models
the end defrost temperature is too low or the
evaporator temperature is too high parameters dt and d/ (defrost probe)
the manual defrost is not activated and the defrost
LED fl ashes compressor protection times set parameter d9 (select d9=1)
the high temperature alarm is shown after a defrost the alarm delay after defrost is too short or the alarm
threshold is too low parameters d8 and AH
the display remains frozen even after the defrost the ambient temperature has not yet reached the
set point or alternatively the time d8 has not elapsed wait or reduce d8
after modifying a parameter the controller continues
working with the old values the instrument has not updated the old value or
alternatively the parameter setting procedure has
not been ended correctly by pressing the SET button
for 3 s turn the instrument off and on again or alternatively
reprogram the parameters correctly
for C models, the fan does not start a compressor and fan start delay has been set
if F0=1 (fan managed by fan controller)
the evaporator is “hot”: the evaporator
temperature can be read by selecting
parameter /d;
dripping in progress;
F1 (evaporator fan control set point) too low.
post-dripping delay set
if F0=0
F2=1 and the compressor is off
dripping in progress
post-dripping in progress
1.
2.
•
•
•
•
3.
•
•
•
parameter c0
parameters F0, F1, Fd, dd and d/
parameters F0, F2, dd and Fd 1.
2.
3.
Table 5.g