Problem Solving - TechGrow HS-1 Manuel

PROBLEM SOLVING:

- The meter does not activate:
Press "SET" for longer than 3 seconds and
try to reactivate the HS-1. Also, check if the
batteries are placed correctly..
- Slow reaction:
Check if the air ducts on the back of the me-
ter are not blocked.
- Errors:
E01: CO2 sensor is damaged.
E02: The value is under range (probably due
to incorrect calibration).
E03: The value is above range.
E07: Too low voltage to measure CO2. Re-
place batteries.
E17: Retry calibration.
E31: Temperature sensor is damaged or de-
fective.
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