1. Dock Wi-Fi disconnect during usage(exclamation mark show up beside Wi-Fi mark on screen)

Reason: Dock disconnects from Wi-Fi router
Solution: Make sure dock is within Wi-Fi signal coverage of router and router is operating well

Reason: Disconnect from cloud server
Solution: Make sure internet service is available

2. Fail to display outdoor PM2.5 data on Dock screen

Reason: Dock disconnect to internet
Solution: Refer to above solution for Wi-Fi connection issue

Reason: User rejects to grant location access to app during Dock configuration
Solution: Manually select city in Dock setting page

Reason: No published data available for certain city on national environment data center(Ministry of Ecology and Environment of the People’s Republic of China)
Solution: Keep monitoring until trustful data available

3. Dock LCD screen display error

Problem: All icon shows on screen or showing unreadable code
Reason: Firmware error
Solution: Go through changing or refunding process if applicable to guarantee clause

Problem: Screen become dark
Reason:  
[1] Dock enters into sleep mode 
[2] Dock is rebooting after firmware upgrade 
[3] Cube battery undercharges (when operating without USB cable) 
[4] Operating with incompatible USB cable
Solution: 
[1] Short press Dock button to turn on screen 
[2] Short press Dock button. If not work, plug off electricity and reboot 
[3] Charge with USB cable
[4] Use compatible USB cable 

Problem: No Cube test data
Reason: Cube is not connecting well to Dock
Solution: Re-insert Cube into Dock

Problem: No temperature/humidity data on screen
Reason: Temperature/humidity sensor damage
Solution: Go through changing or refunding process if applicable to guarantee clause

4. PM2.5 data error

Reason: Environment condition exceeds test upper limit
Solution: Upper limit is 1000μg/m³, please use under limit

Reason: Cube battery undercharges
Solution: Charge with USB cable

Reason: Operate under interference environment(e.g. cooking environment, fog environment)
Solution: Get away from interference source

Reason: Ventilation holes are blocked
Solution: Keep ventilation holes unblocked

5. HCHO data error

Reason: Insufficient aging time during the first time use
Solution: The device needs a period of aging during the first time use, please wait until test data become stable

Reason: HCHO sensor reacts slowly under low temperature, the value may show as 0
Close door and window, wait for longer time

Reason: Cube battery undercharges
Solution: Charge with USB cable

Reason: Disturbed by interference gas(e.g. ethyl alcohol)
Solution: Get away from interference gas

Reason: Disturbed by interference organic agent(e.g. glue, painting)
Solution: Get away from interference organic agent

Reason: Ventilation holes are blocked
Solution: Keep ventilation holes unblocked

6. Fail to upgrade firmware

Reason: Cube battery undercharges
Solution: Charge with USB cable

Reason: Bluetooth signal is not stable during upgrade, if upgrade is through Phone Bluetooth connection
Solution: Keep Smart phone and device close enough during upgrade

Reason: System error
Solution: Retry later

7. Fail to charge the Cube

Reason: USB adapter is not compatible with device
Solution: Select appropriate USB adapter according to user guide

If there are other questions, please contact customer service phone: 400-616-2020