40
CONTROL SYSTEM
Alarms
Alarms table
Alarms activation and reset
The controller is able to perform a complete diagnosis of the unit
detecting all the operating faults and notifying different alarms.
The activation of an alarm implies :
-
involved consumers locked
-
alarm icon shown on the display
-
event recorded in the alarm history
To show the details about the active alarm press the INFO but-
ton.
Alarms that can damage the unit or the plant require a
manual
reset
that implies that the operator has to reset manually the
controller. It is advisable to verify accurately the cause that ori-
ginated the alarm and to make sure that the problem has been
solved before restarting the unit. In any case the unit will restart
only if the cause of the alarm has disappeared.
For the manual reset alarms, pressing the INFO button, along
with the details about the alarm, also the message “Reset ?” will
appear. Press the OK button. When the message “Yes” blinks
press again the OK button to confirm the alarm reset.
The less critical alarms have an
automatic reset
. As soon as the
minimum compressor switch off time has elapsed the controller
tries to reset the alarm. If the cause that originated the alarm has
disappeared, the unit starts working again and the alarm icon is
no more shown on the display. Some of these alarms become
manual reset alarms if the number of events in an hour exceeds
a fixed threshold.
It is possible to reset the active alarms also through the RESET
button or the parameter 6711 that activates the RESET function.
In that case the scheduled delays at the unit switch on are igno-
red avoiding undesired waiting times during commissioning or
fault tracing. This function should NOT be used in normal ope-
ration.
Alarm history
The controller allows to save the last 10 alarms occured during
the unit operation. For each event the following details are re-
corded :
-
alarm code
- hour
- date
Such details can be displayed entering the “Errors” menu (para-
meters from 6800 to 6819).
When the number of saved events is higher than 10 the following
events are saved deleting the oldest alarms.
Code
Alarm
Reset
(1)
Input
Heat pump lock
10
Outdoor air temperature sensor
A
B9
No
25
Flow sensor solid fuel boiler
A
B22
No
26
Common flow sensor
A
B10
No
28
Flue gas sensor
A
B8
No
30
Flow sensor heating circuit 1
A
B1
No
31
Flow sensor cooling circuit 1
A
B16
No
32
Flow sensor heating circuit 2
A
B12
No
33
Heat pump flow sensor plant side
A
B21
No
35
Heat pump return sensor source side
A
B91
Yes
36
Compressor 1 outlet sensor
A
B81
No
37
Compressor 2 outlet sensor
A
B82
No
38
Primary controller flow sensor
A
B15
No
39
Evaporator sensor
A
B84
Yes
43
Return sensor solid fuel boiler
A
B72
No
44
Heat pump return sensor plant side
A
B71
No
45
Heat pump flow sensor source side
A
B92
Yes
46
Return sensor cascade
A
B70
No
48
Liquid line sensor
A
B83
No
50
DHW tanbk sensor 1 (B3)
A
B3
No
52
DHW tanbk sensor 2 (B31)
A
B31
No
54
Flow DHW sensor
A
B35
No
57
Circulation DHW sensor
A
B39
No
60
Room sensor 1
A
-
No
65
Room sensor 2
A
-
No
68
Room sensor 3
A
-
No
70
Plant buffer tank sensor 1 (B4)
A
B4
No
71
Plant buffer tank sensor 2 (B41)
A
B41
No
72
Plant buffer tank sensor 3 (B42)
A
B42
No
73
Solar panel sensor 1
A
B6
No
74
Solar panel sensor 2
A
B61
No
76
Special sensor 1
A
BX
No
81
LPB short-circuit
A
-
No
82
LPB address collision
A
-
No
83
BSB short-circuit
A
-
No
