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2
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HA026202 Issue 2 15/07/99
O
PERATION
Switch on the controller. Following a 3 second self-test
sequence, you will see the display shown below. It is referred to
as the HOME display.
After 2 secs the lower readout will ‘blink’ indicating that the new
setpoint has been accepted.
OP1 will light when heating is ON
OP2 will light when cooling is ON
The display may flash an alarm message. The tables below list
all of the possible messages and their meaning.
A
LARM
M
ESSAGES
Process Alarms
Message Meaning
)
Alarm 1, F
ull Scale Low alarm: The temperature is
below the low alarm setting
#
Alarm 2, F
ull Scale High alarm: The temperature
exceeds the high alarm setting
:
Alarm 3, Dev
iation alarm: The difference between the
setpoint and the temperature exceeds the deviation
alarm setting
D5
Sensor Break:
Input sensor is open circuit or high
resistance. Check the sensor.
Diagnostic alarms
Message Meaning and Action
D5
Electrically Erasable Memory Error:
A parameter value has been corrupted.
Contact Eurotherm Controls.
#<D5
Hardware error:
Return for repair
))))
Low display range exceeded:
Check input signal
####
High display range exceeded:
Check input signal
55
Error 1: ROM self-test fail.
Return for repair
55
Error 2: RAM self-test fail.
Return for repair
55
Error 3: Watchdog fail
.
Return for repair
55
Error 4: Keyboard failure
. Stuck button, or a button
was pressed during power up.
55
Error 5: Input circuit failure.
Return for repair
0=5D
Power failure.
The line voltage is too low.
Check that the supply is within the rated limits
V
IEWING THE
D
ISPLAY
U
NITS
U
SE OF THE
‘S
CROLL
’ B
UTTON
Pressing the scroll button will display the output power and the
two internal setpoints.
U
SE OF THE
‘P
AGE
’ B
UTTON
The “PAGE” button accesses parameter LISTS
Parameters are settings in the controller which you can change to
suit the process. Examples are: ‘Alarms’ and ‘Autotune’. They
are found under headings called LISTS and the full set is shown
on the next page.
Keep pressing to
select more list headings
continue around a continuous loop
3rd press
2nd press
Actual Temperature
Output 1
Output 2
Required Temperature
(Setpoint)
OP1
OP2
*
+
Press and hold to
increase temperature
Press and hold to
decrease temperature
0
0
Setpoint 1
Press or to change value
0
D
2nd Press
Outp
ut
Actual output power %
3rd Press
4th Press
Upper
readout is
parameter
name.
Lower is
value.
Keep pressing to return to the HOME display
Setpoint 2
Press or to change value
)
)O6
69.
)O6
NOTE
If you get lost, pressing and together will
return you to the HOME display.
If, at any time, no key is pressed within 45 seconds, the display
will always return to the HOME display.
Display Units
/
/
Degrees Centigrade
/
/
Degrees Fahrenheit
Momentarily pressing either
button will flash the display for
0.5 secs
*
*
0.5s
°
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