I-65
Z-038791_EN • Rev A
A
dditionAl
i
nformAtion
for
the
i
nstAller
Error
code
Fault description
Explanation
Action(s)
81
LPB short circuit or no bus
power supply
Check LPB connections and bus power
supply.
82
LPB address collision
Check addresses of connected control
modules
83
BSB wire cross-sectional/
no communication
Check connection of the room units
84
BSB wire address collision 2 room devices have the same
assignment (prog.no. 42)
Correct device address.
85
BSB RF communication er-
ror
Check bus connection and components.
91
Data overrun in EEPROM
Internal fault in controller, pro-
cess sensor
Contact AIC technical support.
98
Extension module 1, error
Chceck extension module connections.
99
Extension module 2, error
Chceck extension module connections.
100
2 clock time masters
Check time master
102
Clock time master without
backup
Check clock
103
Communication error
Check connection and components
105
Maintenance message
See maintenance code (press informa-
tion button once) for detailed information
109
Supervision boiler temper-
ature
Contact AIC technical support.
110
STB (SLT) lockout
No heat removal, STB interrup-
tion, possible short-circuit in the
gas valve, internal fuse faulty;
Allow device to cool down and carry out
reset; if the fault occurs several times in-
form AIC technical support
111
Temperature limiter safety
shutdown
Contact AIC technical support.
117
Water pressure too high
Release the water to a suitable pressure
118
Water pressure too low
Top up the system with water to reach a
suitable pressure
121
Flow temperature heating
circuit 1 not reached
Heat losses in circuit
Check the circuit for fault insulation and
heat losses.
122
Flow temperature heating
circuit 2 not reached
Heat losses in circuit
Check the circuit for fault insulation and
heat losses.
125
Maximum boiler tempera-
ture exceeded
Contact AIC technical support.
126
DHW charging temperature
not reached
Check operation and heat up times for
DHW
127
DHW legionella tempera-
ture not reached
Check operation of appliance
128
Loss of flame during oper-
ation
Ionization current lost after suc-
cessful ignition
Check electric supply, polarity and ioniza-
tion electrode.
129
Wrong air supply
Check air supply
