121
Failure mode detected by the remote controller
Check code
Diagnostic functional operation
Determination and action
Operational cause
Status of air to
water heat pump
Condition
Not
No communication between hydro
unit an remote controller
on.
1.
2.
3.
E01
No communication between hydro
unit and remote controller
1.
2.
3.
4.
E02
Failure in the signal transmission
to the hydro unit.
1.
E09
Several remote controller base
units
are handsets.
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
operation
Automatic
reset
P26
Short circuit of the compressor driver
element failure
O
1.
2.
rare short.
8 134
P29
Compressor rotor position failure
O
1.
2.
8 134
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