Daikin ComfortNet DX7TC Service Instructions Manual page 115

TROUBLESHOOTING
Troubleshooting
Error Code:
H8 - High line voltage
Applicable Models:
Outdoor units
Method of Error Detection:
Integrated control module LED
display provides the indicated
error code
Error Decision Conditions:
Air conditioner/heat pump may
appear to be operating normally.
Compressor protector may be
open (compressor and outdoor fan
off). Integrated control module
diagnostic/ status LED display
shows the indicated code
Board is
reading H8
Is the voltage to
Yes
the system within
our specified
parameters?
No
ERROR CODE - H8
Error Code - H8
Replace the board
Check voltage wires and get an
electrical company involved if
necessary
115