Faults Displayed On The Control Box; Information Display - Fujitsu UTW-SCBYA Installation And Operating Manual

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6 Troubleshooting
Depending on whether the fault comes from the
hydraulic circuit or refrigerant circuit, the fault may be
indicated by the digital display or the diode on the heat
pump.
6 1

Faults displayed on the control box

Faults or breakdowns on the hydraulic circuit are
indicated by the display on the user interface of the
control box.
Control box : Fault visible on the digital display
Error number Error contents
-
No connection.
10
Outdoor sensor.
33
Heat pump initial temperature sensor error.
44
Heat pump return temperature sensor error.
50
DHW temperature sensor.
60
Ambient temperature sensor 1.
105
Maintenance message.
121
Flow temperature for (HC1) not reached.
127
Anti-legionella temperature not reached.
369
External fault (safety component).
Heat pump error
370
(Refer to the service manual of the heat pump).
6 2

Information display

Various data can be displayed by pressing the
info button
.
Depending on the type of unit, configuration and
operating state, some of the info lines listed below may
not appear.
- Possible error messages from the error code list.
- Possible service messages from the maintenance
code list.
- Possible special mode messages.
- Various data (see below).
" Ensure that the general electrical power supply has been cut off before starting any repair work
" When the HP is not under tension, protection frost-free is not assured
Installation and operating manual "1395 - EN"
The display shows the "Bell" symbol
Press the Info key
of the fault.
When the error has been resolved, the faults are
re-initialised at zero automatically.
Error location
Failure to comply with
room thermostat's polarity.
B9
B21
B71
B3
Designation
Floor drying current setpoint .
Current drying day.
Terminated drying days.
State heat pump.
State supplementary source.
State DHW.
State swimming pool.
State heating circuit 1.
State cooling circuit 1.
Outdoor temperature.
Room temperature 1.
Room setpoint 1.
Flow temperature 1.
Flow temperature setpoint1.
DHW (domestic hot water) temperature.
Heat pump return temperature.
Setpoint (return) HP.
Heat pump flow temperature.
Setpoint (flow) HP.
Swimming pool temperature.
Swimming pool temperature setpoint.
Control Box
.
for more details on the origin
Heat pump operation
despite the error
No
Yes with OT = 0 °C
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Line
-
-
-
8006
8022
8003
8011
8000
8004
8700
8740
8743
8830
8410
8412
8900
- 35 -

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