Troubleshooting; Weak Batteries; Command Not Confirmed - HomeMatic IP HmIP-eTRV-B-2 Manual De Instalacion Y Uso

Caution! There is a risk of explosion if the battery is not replaced
correctly. Replace only with the same or equivalent type. Never
recharge non-rechargeable 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.
9

Troubleshooting

9.1

Weak batteries

Provided that the voltage value permits it, the radiator thermostat 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 empty battery symbol
( ) and the corresponding error code will be displayed on the device (see
see „9.4 Error codes and flashing sequences" on page 50). In this case,
replace the empty batteries by two new batteries (see see „8 Replacing
batteries" on page 48).
9.2

Command not confirmed

If at least one receiver does not confirm a command, the device LED
lights up red at the end of the failed transmission process. The failed
transmission may be caused by radio interference (see see „12 General
information about radio operation" on page 53). The failed transmission
may also be caused by the following:
• Receiver cannot be reached.
• Receiver is unable to execute the command (load failure,
mechanical blockade, etc.).
• Receiver is defective.
Troubleshooting
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