New Holland CX720 Operator's Manual page 104

SECTION 2 – CONTROLS, INSTRUMENTS AND OPERATION
Troubleshooting the temperature control
system
Code "01" displayed instead of temperature setting –
High pressure lockout, press the climate control
switch (6) to the center OFF position, then to the
forward automatic position or rearward to the defog
position as required. Digital temperature display
should reappear. If code "01" reappears, system
requires service.
Code "02" displayed instead of temperature setting –
Low pressure lockout, press the climate control
switch to the OFF position, then to the automatic
position. Digital temperature display will reappear. If
code "02" reappears, system requires service.
Code "04" alternating with temperature setting –
possible faulty blower control potentiometer, blower
defaults to maximum speed. System requires
service.
Code "05" alternating with temperature setting –
possible faulty temperature control potentiometer,
system defaults to 20° C (68° F). System requires
service.
Code "08" alternating with temperature setting –
possible faulty cab temperature sensor or cab
temperature is below –19° C (–2° F). Adjust
temperature control above 23° C (74° F). If error code
does not clear after cab temperature rises above
–19° C (–2° F), system requires service. In order to
continue operation, temperature control must be set
above 21° C (70° F) or below 19° C (66° F).
Code "10" alternating with temperature setting –
possible faulty evaporator sensor or cab temperature
is below –19° C (– 2° F). Compressor does not run.
If error code does not clear after cab temperature
rises above – 19° C (–2° F), system requires service.
Code "11" alternating with temperature setting –
possible faulty evaporator sensor or core tempera-
ture has exceeded 82° C (180° F). Compressor does
not run. If error code does not clear, system requires
service.
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