Faults; Avs 75 Technical Characteristics - Siemens AVS 75.391 Handbuch

8. FAULTS

The specific faults that can occur during the configuration of a cascade system are described below. For a list of faults in the indi-
vidual boiler, consult the boiler instructions manual.
After recovering the correct configuration, it may be necessary to wait a few minutes for the fault signal to disappear.
Fault
10 External probe sensor
26 Cascade flow sensor
46 Cascade return sensor
50 DHW storage sensor
82 LPB, address conflict
84 BSB address conflict
321 DHW probe
98 Additional module 1
99 Additional module 2
373 Additional module 3
100 Clock error
102 Clock error
335 BX21 no function
336 BX22 no function
353 No B10 cascade sensor

9. AVS 75 TECHNICAL CHARACTERISTICS

Power input Input voltage
Operating frequency
Power input
Power supply fuse (power supply and outputs)
Cables Rigid or flexible wire (braided or with ferrule)
one-pole
two-pole
Operating data Software class
Operating mode EN 60 730
Inputs Digital input H2
very low safety voltage for clean contact
low voltage contact
voltage with contact open
current with contact closed
Analogue input H2
Very low protection voltage
range
internal resistance
Input L
internal resistance
Input sensors BX21, BX22
permitted connection cables (copper)
cross-section
maximum length
Outputs Output relay
current range
maximum starting current
maximum current (for all relays)
voltage range
Interface BSB
length of base unit - peripherals
total length
cable cross-section
Maximum number of boilers in cascade connection
Description of fault
Heating circuit enabled with no command (thermostat, room unit or external unit) or
external probe faulty
Cascade flow temperature sensor faulty
Cascade return temperature sensor faulty
DHW storage sensor faulty
Same address assigned to 2 or more boilers
2 or more room units configured for the same heating circuit
DHW temperature sensor faulty
AVS 75 accessory not detected or recognised
AVS 75 accessory not detected or recognised
AVS 75 accessory not detected or recognised
Incorrect clock configuration
Incorrect clock configuration
BX21 sensor not configured
BX22 sensor not configured
AVS75 not configured
AC 230 V (±10 %)
50/60 Hz
4 VA
max. 10 AT
0.5...2.5 mm
0.5...1.5 mm
A
1b (automatic operation)
DC 12 V
DC 3 mA
DC 0..10 V
> 100 kΩ
AC 230 V (±10%)
> 100 kΩ
NTC 10k
-
AC 0.02...2 (2) A
15 A for ≤1 s
AC 6 A
AC 24...230 V (for clean contact)
connection with 2 cables, not interchangeable
max. 150 m
max. 300 m (maximum capacity of cable 60nF)
0.5 mm
16
23
-
2
2
-
-
-
-
-
-
mm 0,25 0,5
2
m 20 40
2
0,75 1,0 1,5
60 80 120
7105035.03 (1-10/11)