dE2
Cause 3: The IDU main control board
is damaged
Cause 4: If the error cannot be cleared
after causes 1/2/3 have been
eliminated, the PM2.5 sensor is
damaged
Replace the main
control board of the
IDU
Replace the PM2.5
sensor (1)
Cause 1: The communication cable
between the PM2.5 sensor and the
sensor control board becomes
disconnected or short circuited
Replace the
communication
cable and properly
connect the cable
Cause 2: The communication cable
between the PM2.5 sensor and the
adapter board has become loose
Connect the cable
properly
Note:
1. If the PM2.5 sensor is integrated with the sensor control board, making disassembly difficult, then replace
the sensor control board directly.