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11.2 Pumps with PTC
In such cases where pumps feature a cold conductor (PTC) to monitor temperature, the conductor
Ls
A1
Y1
Y2
21
13
FTM
BV97
A2
T1
T2
22
14
Ns
T2 >
T
11.3
Operation with rechargeable batteries
In case of mains voltage loss, the controller will continue to function.
For security reasons the pump relays, however, are switched off (= Pumps OFF).
When operating with a rechargeable battery, the operation is indicated by a blinking battery symbol
instead of a flashing triangle.
The operating time when using a rechargeable battery, when fully charged, is approximately 10 hours
(alarm relay deactivated, no modem).
The rechargeable battery voltage is available at the 12V terminals, for example, for operating of a
beacon.
Attention: Depending on the load, the operating time, however, could be significantly shorter!
In case of control voltage loss, first the fault message "POWER" is generated and the control
continues to operate. When the rechargeable battery voltage falls below approx. 10,5 V, then
additionally the fault message "ACCU" is generated. At this point of time, all relays are deactivated in
order to keep the load on the rechargeable battery as low as possible. Data communication, however,
is still possible. When the voltage falls below ca. 9,5V, the control goes in the stand by mode. The
following message is displayed:
must be connected to a PTC motor protection relay (for
example Scharco FTM BV97-230V). It is recommended to
adjust the relay for automatic reset and to carry out the alarm
reset on the control panel. The output relay has to be con-
TL
nected such that the contacts are opened in case of a fault.
TM
TH
The example on the left shows connection for one pump with a
PTC and a thermal contact.
HOMA Pump Technology
Connection of thermo contacts
HSK_operating_manual_English_Ver3.doc
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