Daikin homecontrols EKRRVATU1BA, Installation And Operation Manual

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Troubleshooting Troubleshooting
8.2 Duty cycle
The wireless DHC accessories operate in the following
frequency bands:
• 868,000~868,600 MHz
• 869,400~869,650 MHz
In order to safeguard operation of all devices working in
this range, it is legally required to limit the transmission
time of devices. Limiting the transmission time minimizes
the risk of interference.
The ‘duty cycle’ is the maximum transmission time. It is
the ratio of the time that a device is actively transmitting
in comparison to the measurement period (1 hour), and is
expressed as a percentage of 1 hour.
If the total amount of allowed transmission time is reached,
the DHC accessory will stop transmitting until the time limit
is reached.
For example, when a device has a duty cycle limit of 1%,
it is only allowed to transmit 36 seconds in 1 hour. After
this, it will stop transmitting until the 1 hour limit is reached.
DHC accessories fully comply to this limitation and use
2 frequency bands with a duty cycle of respectively 1 %
and 10%.
During normal operation of the DHC accessories, this limit
is not usually reached. However it is possible that the limit
is reached during start-up or during a fresh installation of
a system. In this case, the LED of the accessory lights
up red. It may be non-responsive for a short period (max.
1 hour), until the time restriction for transmission has ex -
Attention! There is a risk of explosion if the bat-
tery 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 reg-
ular domestic waste! Instead, take them to your
local battery disposal point.
8 Troubleshooting
8.1 Weak batteries
Provided that the voltage value permits it, the accessory
will remain ready for operation even 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 „8.3 Error codes and
flashing sequences“ on page 26). In this case, replace
the empty batteries by two new batteries (see „7 Replac-
ing batteries“ on page 23).