Airco: Reservation sleep time is not available

[erkr]

Describe the bug
Thanks for the great efforts spend on this integration for LG devices!
I ran into a bug. When I set the sleeptimer like this:

action: smartthinq_sensors.set_sleep_time
data:
  sleep_time: 60
target:
  entity_id: climate.slaapkamer_airco

That works when the airco is in cool mode. But not in heat mode. In that mode I get this error: Reservation sleep time is not available.

Expected behavior
Should also work in heat mode. With the official app the mode doesn't matter, so I guess it's just not implemented for all modes by this integration.
Screenshots
If applicable, add screenshots to help explain your problem.

Environment details:

• Environment: HASSIO,
• Home Assistant version installed: 2024.12.5
• Component version installed: 0.40.3
• Last know working version: na
• LG device type and model with issue: LG ⸱ RAC_056905_WW-RAC (AC)
• LG devices connected (list):
  3 devices
  Output of HA logs
  Paste the relavant output of the HA log here.

Logger: homeassistant.helpers.script.websocket_api_script
Source: helpers/script.py:526
First occurred: 10:06:41 (2 occurrences)
Last logged: 10:07:04

websocket_api script: Error executing script. Unexpected error for call_service at pos 1: Reservation sleep time is not available
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 526, in _async_step
    await getattr(self, handler)()
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 764, in _async_call_service_step
    response_data = await self._async_run_long_action(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<9 lines>...
    )
    ^
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 727, in _async_run_long_action
    return await long_task
           ^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2802, in async_call
    response_data = await coro
                    ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2845, in _execute_service
    return await target(service_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 1007, in entity_service_call
    single_response = await _handle_entity_call(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
        hass, entity, func, data, call.context
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 1079, in _handle_entity_call
    result = await task
             ^^^^^^^^^^
  File "/config/custom_components/smartthinq_sensors/climate.py", line 473, in async_set_sleep_time
    await self._device.set_reservation_sleep_time(sleep_time)
  File "/config/custom_components/smartthinq_sensors/wideq/devices/ac.py", line 879, in set_reservation_sleep_time
    raise ValueError("Reservation sleep time is not available")
ValueError: Reservation sleep time is not available

Additional context
Add any other context about the problem here.