-
130
-
Service
'10 • HM-T-149
Exceptional processing of DM value
In case the actual supply water temperature BT2 deviates from the target temperature drastically, DM value is sometimes forcibly
overwritten to make the water temperature close to the target quickly.
Forced outdoor unit operation
In case the actual supply water temperature is lower than the target temperature and the gap is bigger than the value set in Menu 9.3.12
(Supply temp diff) when the outdoor unit is not operating, the DM value is overwritten to smaller value than in Menu 9.1.1 by 1,
which results in starting the outdoor unit operation immediately.
For details, see timing chart on page 134.
Forced combined mode operation
In case the actual supply water temperature is lower than the target temperature and the gap is bigger than the value set in Menu 9.3.12
plus 9.3.13 (Diff HP add. heat) during Alternating mode operation, the DM value is overwritten to bigger value than in Menu 9.2.1 by
1, which result in going into combined mode operation earlier.
For details, see timing chart on page 134.
Forced outdoor unit stop
In case the actual supply water temperature is higher than the target temperature and the gap is bigger than the value set in Menu
9.3.12 when the outdoor unit is operating, the DM value is overwritten to 1, which results in stopping the outdoor unit operation
immediately if there is no hot water demand.
Exceptional compressor speed control
Forced minimum compressor speed operation
When the compressor starts, the request frequency is set at minimum for certain period. The period can be set in Menu 9.6.5.
This control is cancelled when (1) the set time has elapsed, or (2) DM value gets signicantly low.
Operation control function by the indoor unit controller
To Next Page
Loading...
Need help?
General
