User Instructions Low Temperature Freezers Model UNI/LT
To quit the procedure:
•
press
and
4 s or do not operate
60 s.
Switch off/on the power supply of the instru-
ment after the modi
fic
ation of the param-
eters.
21 SIGNALS
LED MEANING
out 1 LED load
if it is lit, the load will be turned on;
also look at parameter u9
if it flashes:
•
the modification of the working
setpoint will be running
•
a load protection will be running
(parameters C1 and C2)
LED defrost
if it is lit, the defrost will be running
LED alarm
if it is lit, an alarm will be running
°
C LED Celsius degree
if it is lit, the unit of measure of the
temperatures will be Celsius degree
(parameter P2)
°
F
LED Fahrenheit degree
if it is lit, the unit of measure of the
temperatures will be Fahrenheit de-
gree (parameter P2)
CODE MEANING
Loc the keyboard and/or the working
setpoint are locked (parameter r3);
also look at paragraph 2.5
22 ALARMS
CODE MEANING
ALARM First temperature alarm
LOW Remedies:
AL1
•
check the room temperature
•
look at parameters A1 and A3
Effects:
•
the alarm output will be deacti-
vated; also look at parameter u3
ALARM Second temperature alarm
HIGH Remedies:
AL2
•
check the room temperature
•
look at parameters A5 and A7
Effects:
•
the alarm output will be deacti-
vated; also look at parameter u3
When the cause that has provoked
the alarm disappears, the instrument
restores the normal operation.
23 INTERNAL DIAGNOSTICS
CODE MEANING
Pr1 Room probe error
Remedies:
•
check the integrity of the probe
•
check the connection instrument-
probe
•
check the room temperature
Effects:
•
the load activity will depend on
parameters C4 and C5
•
the alarm output will be deacti-
vated; also look at parameter u3
When the cause that has provoked the alarm
disappears, the instrument restores the normal
operation.
7
9