Fujitsu WSYA050ML3 Design & Technical Manual page 61

¢ Error codes
• Hydraulic indoor unit: Fault visible on the digital display
Error
Error contents
number
10 Outdoor sensor
30 Flow sensor mixing circuit
33 Flow sensor HP
44 Return sensor HP
50 DHW sensor 1
60 Room sensor 1
65 Room sensor 2
83 BSB, Short circuit
105 Maintenance message
Flow temperature mixing circuit
121
(too low)
Flow temperature direct circuit
122
(too low)
127 Legionella temperature
212 Internal communication failure
External fault
369
(Safety component)
370 Thermodynamic source*
441 BX31 no function
442 BX24 no function
443 BX33 no function
444 BX34 no function
516 Heat pump missing
— No connection
*: A fault in the outdoor unit is indicated by LED located on the hydraulic unit interface board.
Error location
X84
X153
X70
X70
X84
X86
X150
X11 (EX3)
The polarity of the room
sensor is not respected.
- (03-3) -
Reset
Heat pump
operation
Manual Auto
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
— —
1. User interface and remote controller (Optional parts)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No