22
Troubleshooting
Symptom
Cause of Failure
Recommendation
LED cannot be dis
-
played.
1.
No
battery
power.
2.
Battery polar-
ity reversed.
1.
Replace battery.
2. Refit the battery
with correct polarity.
Temperature/hu
-
midity reading is
incorrect.
1. The sensor is
out of order.
1.
Leave the detector
without operating for a
period
2. Do not open the de
-
tector; contact supplier.
Warning
Do not dispose of electrical appliances along with gen-
eral waste, use separate collection facilities.
Contact your local council for information regarding
the collection systems available.
If electrical appliances are disposed of in landfills or
dumps, hazardous substances can leak into the ground-
water damaging the environment and human health.
When replacing old appliances with new ones, the re-
tailer is legally obligated to take back your old appli-
ance for disposal free of charge.
