115
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
operation
Automatic
reset
A15
Pump failure (for zone2)
O
1.
2
E03
Regular communication failure
between hydro unit and remote
controller
O
1.
2.
1
E04
Regular communication failure
between hydro unit and outdoor unit
O O
1.
outdoor unit
1 117
E08
Duplicate address of Hydro unit, or
Duplicate master Hydro unit during
Group control
O
1.
1
E14
Regular communication failure
between hydro unit and 0-10 V-IF
1.
2.
1
E18
Regular communication failure
between master Hydro unit and slave
Hydro unit during Group control
O
1.
Hydro unit.
1
F03
TC sensor failure
O O
1.
1 117
F10
TWI sensor failure
O O
1.
1 119
F11
TWO sensor failure
O
1.
1 119
F14
TTW sensor failure
O
Hot water
O
1.
1 120
F17
TFI sensor failure
Hot water
O
O
1.
1 120
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