Installation, user and maintenance manual
– AY Condensing line, AY series
79
E 129
GAS SOLENOID
VALVE WITHOUT
ELECTRICAL
POWER
The gas solenoid valve has
been off for more than 10
minutes (with the flame
controller on), or "E 101" is
keeping the flame controller
on. Or also in the case that,
with the flame off (but flame
controller on) "E 101" obtains
when generation of "u/E" is
enabled.
Reset via the controller, menu 2,
parameter 21 (or via DDC). If the code
persists, contact authorised Robur TAC.
E 135
DELIVERY WATER
TEMPERATURE
PROBE FAULT
(MACHINE CIRCUIT)
The delivery water probe on
the internal circuit (machine
circuit) is faulty.
Contact authorised Robur TAC.
E 136
MODULATING
BLOWER FAULT
The blower speed is out of
range.
Contact authorised Robur TAC.
u 175
SYSTEM CIRCUIT
WATER PRESSURE
SWITCH -
Insufficient water
flow
The system circuit water
circulator is on and the
system circuit water
differential pressure switch is
open.
Automatic, when the circulator turns off
or the pressure switch closes.
E 175
SYSTEM CIRCUIT
WATER PRESSURE
SWITCH -
Insufficient water
flow
Event U175 has been
generated 5 times since the
appliance was powered up, or
code U U175 has been active
for 2 hours.
Carry out appropriate checks. Reset via
the controller, menu 2, parameter 21 (or
via DDC). If the code persists, contact
authorised Robur TAC.
E 176
OUTPUT WATER
(SYSTEM)
TEMPERATURE
PROBE FAULT
Fault (interruption or short
circuit) on outlet system
water temperature sensor.
Reset via the controller, menu 2,
parameter 21 (or via DDC). If the code
persists, contact authorised Robur TAC.
E 177
INPUT WATER
(SYSTEM)
TEMPERATURE
PROBE FAULT
Fault (interruption or short
circuit) on inlet system water
temperature sensor.
Reset via the controller, menu 2,
parameter 21 (or via DDC). If the code
persists, contact authorised Robur TAC.
u 178
DELIVERY WATER
TEMPERATURE
(MACHINE CIRCUIT)
HIGH
The water temperature on
the internal circuit (machine
circuit) is too high.
Automatic (on termination of
originating event).
u 179
DEFROST
FUNCTION
ACTIVATED
The temperature of the
water has reached values
which could result in icing.
In such cases, to prevent
the appliance arresting, the
defrost function may activate
only the system circuit
circulator or also the flame
controller.
The defrost function is de-activated
automatically when the flame controller
switches off and/or the circulator
switches off. These switch off when the
water temperature has reached the
values required to ensure operation of
he appliance. The defrost function can
also be de-activated manually via the
controller, menu 4, parameter 163.
u 80
INCOMPLETE
PARAMETERS
Incomplete functional
parameters (menus 3, 4 and
5).
The code persists until operating
parameters are entered and completed.
Contact authorised Robur TAC.
E 80
INVALID
PARAMETERS
Invalid parameters (menu
6) or damage to parameter
memory.
Reset occurs automatically when correct
parameters are entered. If the code
persists, contact authorised Robur
TAC: if the memory is damaged, the
controller must be replaced.
u 81; u
82
"BANK 1" AND
"BANK 2"
PARAMETERS:
INVALID
Bank 1 data invalid - Bank 2
data invalid: in both cases,
one of the two parameter
memory pages contains
invalid values.
Automatic (on termination of
originating event).
