Haier air conditioner
Edition: 20070116
- 47-
F4: Overheat protection for exhaust temperature
Yes
Electrify the machine again and turn it on with
the remote controller, then measure the
temperature at the exhaust temperature
sensor of the compressor on the outdoor unit
and check whether the temperature exceeds
110
shortly after the machine starts up
ć
Measure the temperature at the
exhaust temperature sensor of the
compressor on the outdoor unit and
Malfunctions occur after running for
some time even though the measured
temperature is below 110
ć
.
Pull out the exhaust sensor and measure its
resistance at standard temperatures. Check
whether the results deviate much from those
in the resistance-temperature table
1) The cryogen may have
been leaked during
installation, or there may
be leakage in the piping
system.
2) There may be other
causes to make the
exhaust temperature too
high.
Exhaust temperature
sensor is broken and
needs be replaced
The sensor is damaged.
Replace the sensor with a
new one.
No
No
Yes
Yes
The outdoor mainboard is
damaged and needs be
replaced
No