116
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
operation
Automatic
reset
F18
THO sensor failure
O
1.
1 120
F19
Detection of THO disconnection
failure
1.
2.
1 121
F20
TFI sensor failure
Hot water
O
1.
1 122
F23
Low pressure sensor failure
O O
1.
2.
1 123
F30
Extended IC failure
1.
1 123
F32
Flow sensor failure
O
1.
sensor.
2.
1 124
F33
Flowing quantity failure
4
124
by
2
L02
Combination failure
different.
1.
outdoor unit.
1 125
L03
Duplicate main Hydro unit during
Group control
1.
2.
1
L07
Communication failure
1.
1 125
L08
Hydro Unit group / Address unset
for Hydro units.
1.
1
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