Troubleshooting; Weak Battery - HomeMatic HMIP-WTH Mounting Instruction And Operating Manual

Once the batteries have been inserted, the wall thermo-
stat will perform a self-test/restart (approx. 2 seconds).
Afterwards, initialisation is carried out. The LED test dis-
play will indicate that initialisation is complete by lighting
up orange and green.
Never recharge standard batteries. Do not throw
the batteries into a fire. Do not expose batteries
to excessive heat. Do not short-circuit batteries.
Doing so will present a risk of explosion.
Used batteries should not be disposed of with
regular domestic waste! Instead, take them to
your local battery disposal point.
8

Troubleshooting

8.1

Weak battery

Provided that the voltage value permits it, the wall ther-
mostat will remain ready for operation also if the battery
voltage is low. Depending on the particular load, it may
be possible to send transmissions again repeatedly, once
the batteries have been allowed a brief recovery period.
If the voltage drops too far during transmission, the emp-
ty battery symbol ( ) and the corresponding error code
will be displayed on the device (see „8.4 Error codes and
flashing sequences" on page 39). In this case, replace
the empty batteries by two new batteries (see „7 Replac-
ing batteries" on page 36).
Troubleshooting
37