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V8 VRF Indoor Units
6.1.33 dE4 - Formaldehyde sensor fault
Error display
The faulty IDU and other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
Error trigger
If the main control board of an IDU has lost communication with formaldehyde sensor for 2 min
Error recovery
Automatic recovery
Possible cause
See the Troubleshooting section.
Troubleshooting
Note 1:
1) The formaldehyde sensor pins should be inserted on the sensor control board according to the wiring
nameplate.
2) When inserting and removing the sensor, do not touch or squeeze the white sensor film with your hand.
3) When inserting and removing the sensor: Operators must keep their hands clean and dry; the antistatic
wrist strap should be worn on the wrist; the metal piece inside the antistatic w rist strap should be in close
contact with the skin; and the metal clamp of the antistatic wrist strap should be placed at the exposed
copper grounding wire.
80
Digital display
Display position
Panel, display box, and wired controller
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