Fujitsu WGYA050DG6 Design & Technical Manual page 121

Ref 3 Functions
Hydraulic unit : Fault visible on the digital display.
Error
Error contents
number
- No connection
Outdoor sensor
10
33 Flow sensor HP
44 Return sensor HP
50 DHW sensor
60 Room sensor 1
65 Room sensor 2
105 Maintenance message
121 Flow temp HC1 not reached
122 Flow temp HC2 not reached
127 Anti-legionella temp not reached
369 External fault (safety component)
Outdoor unit error
370
- Definitions
- Reading error codes
Error location
Failure to comply with
room thermostat's
polarity
X86
X70
X70
X84
See the next page
- (CS01 - 05) - - (CS01 - 05) -
Heat pump operation
despite the error
No
Yes with OT = 0 °C
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Control system