Fujitsu Waterstage WOYG140LCTA Manual page 66

Air to Water Heat Pump split system
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)
516 Heat pump missing
" 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.
- 66 -
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
Check the wiring between X60
and the interface board.
Installation and operating manual "1765 - 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
No