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7 . Abnormity Diagnose
1.Sensor Diagnose:
2 seconds after the sensors open circuit or short circuit , the unit will turn off automatically and the LED wil
show E0 until the sensors resume .
Firstly check whethe r Terminal CN on
the indoor mainbo ard contact well or
not?
Pull the sensor out of the mainboard
1) Measure the value of resis tance
betwe en its two jumper s
2) Measure the temp erature at the
room tempe rature sensing head.
Check the specificati ons of the senso r
to
decide
whether
damaged or not?
The Indoor PCB is broken.
YES
the
sensor
is
NO
Pull out the terminals on the indoor
NO
mainboard and reinsert them.
YES
Replace with new sensor.
YES
Replace with new indoor PCB
17
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