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8 Operation Control
8.1. Operation node
1. Thermostat control
2. Depend on differences between room temperature and setting temperature, Compressor running frequency will be decided
and start operation.
Temperature differences become same as below table, then thermostat is off.
3. Select indoor temperature thermostat
When connected to wired remote controller, either indoor unit thermostat or remote controller thermostat is available, using
remote control setting.
8.2. Compressor start control
• When the compressor start, compressor frequency will be fixed at lower level for certain time, to follow the below table, due to
avoid the compressor oil discharge.
• Judging from compressor discharge temperature, decide the start condition to select either cool start control, or warm start
control.
Warm start : set 1 *set 5 normal control
Cool start : set 1 set 2 set 3 set 4 *set 5 normal control
•Note
- Frequency at *set 5 = frequency calculated by normal control
- In case of frequency at set n (set 1, set 2 or set 3) excess the frequency at set 5 in cool condition, skip from set n (set 1,
set 2 or set 3) to set 4 and transfer to set 5.
8.3. Cooling operation
8.3.1. Cool indoor fan control
• Fan speed manual
Operation start at hi speed, or medium speed, or low speed set by remote control.
• Fan speed auto
When operation start, or shifting to thermostat ON condition from thermostat OFF condition, odour cut operation (refer odour cut
operation page for detail), after thermostat ON condition, indoor fan operate as below control.
When 1st thermostat on condition from operation start, fan speed is hi (same as manual fan speed), after 2nd thermostat on
condition, fan speed change to medium speed (same as manual medium fan speed).
Temperature Differences
Unit: C
Indoor type Cassette Ceiling Duct D1 Duct D2 Duct D3
Cool mode -1.5 -1.5 -2.0 -2.0 -2.0
Dry mode -2.5 -2.5 -3.0 -3.0 -3.0
Heat mode 3.5 2.5 2.5 2.5 2.5
Discharge temp. [C] >15C
15C
Start control Warm start Cool start
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