Ferroli HSW 11.1, Инструкция по установке и эксплуатации

Страница: 41 / 48

CONTROL SYSTEM
41
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 con-
troller 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. In that case the scheduled delays at the unit
switch on are ignored avoiding undesired waiting times during
commissioning or fault tracing. This function should NOT be
used in normal operation.
Alarm history
The controller allows to save the last 10 alarms occured
during the unit operation. For each event the following details
are recorded :
- alarm code
- hour
- date
Such details can be displayed entering the “Errors” menu
(parameters from 6800 to 6819).
When the number of saved events is higher than 10 the follo-
wing events are saved deleting the oldest alarms.
Alarms
Note:
(1) A = automatic reset , M = manual reset , A / M = manual reset only if the number of events in an hour is higher than 3.
(2) Only for brine-water units
(3) Only for water-water units
Alarms table
Code Alarm
Reset
(1) Input
Heat pump
lock
10 Outdoor air temperature sensor A B9 No
33 Plant side flow temperature sensor A B21 No
35 Source side return temperature sensor A B91 Yes
(2)
44 Plant side return temperature sensor A B71 No
45 Source side flow temperature sensor A B92 Yes
(3)
106 Sorce side temperature too low M - Yes
201 Plant side frost protection alarm A B21 Yes
222 High pressure during heat pump operating A / M E10 Yes
223 High pressure during heating circuit start M E10 Yes
224 High pressure during domestic hot water circuit start M E10 Yes
225 Low pressure A / M E9 Yes
228 Source side flow switch A / M E15 Yes
355 Phase sequence controller A / M E21 - E23 Yes
356 Plant side flow switch A / M E24 Yes
The controller diagnostic takes into account, besides the alarms reported in the table, many other alarm codes the meaning of
which is indicated on the unit display when the corresponding alarm becomes active. Such alarms are not critical and don’t lock
the heat pump operation.