Daikin ComfortNet DX7TC Service Instructions Manual page 104

TROUBLESHOOTING
Troubleshooting
Error Code:
01, L1 - Low pressure cutout
Applicable Models:
Outdoor units
Method of Error Detection:
Integrated control module LED
display provides the indicated
error code
Error Decision Conditions:
Compressor and outdoor fan are
off. Low pressure switch trip 3
times within same thermostat
demand. Thermostat demand is
present. Integrated control module
diagnostic/ status LED display
shows the indicated code
104
Board is
reading 01, L1
Check the
No
resistance of low
pressure switch, is
it open?
Yes
Read pressure
No
on a guage, is
the pressure
low?
Yes
ERROR CODE - 01, L1
Error Code - 01, L1
Check voltage wires and get an
electrical company involved if
necessary
Replace pressure switch
Verify the indoor airflow, verify
charge, check the thermostat
setting