Troubleshooting; Faults Displayed On The Hydraulic Unit - Fujitsu WATERSTAGE WOYG112LHT Maintenance Document

Air to Water Heat Pump (Split integrated DHW type)

10 Troubleshooting

Depending on whether the fault comes from the outdoor unit or the hydraulic unit, the fault may be indicated by the
digital display or the LED on the interface cards.

10 .1 Faults displayed on the hydraulic unit

Faults or breakdowns on the hydraulic unit are indicated by the display on the user interface.
The display shows the
Press the key for more details on the origin of the fault.
When the error has been resolved, the faults are re-initialised at zero automatically.
Hydraulic unit: Fault visible on the digital display.
Error number Error description
-
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.
65 Ambient temperature sensor 2.
105 Maintenance message.
121 Flow temperature for (HC1) not reached.
122
Flow temperature for (HC2) not reached.
127 Anti-legionella temperature not reached.
369 External fault (safety component).
Outdoor unit connection error
370
(In the start phase, see the para. "Start-up").
441 2e zone sensor not configured (if 2nd circuits kit)
- 68 -
symbol.
Error location
Failure to comply with room
thermostat's polarity.
B9
B21
B71
B3
See below.
BX31; Set the parameter 5700
to 2, 4 or 6
Installation and operating manual "1768 - EN"
Heat pump
operation despite
the error
No
Yes with OT = 0 °C
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No