Operation Control; Operation Mode; Compressor Start Control; Cooling Operation - Panasonic CS-F24DTE5 Service Manual

9 OPERATION CONTROL

Description of basic control functions
9.1.

Operation Mode

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.
Indoor type
Cool mode
Dry mode
Heat mode
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.
9.2.

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 excess the frequency at set 5 in cool condition, skip from set n to set 4 and transfer to set 5.
9.3.

Cooling Operation

9.3.1. Cool indoor fan control
• • • • Fan speed manual
Common control for unit using DC motor / unit using AC motor.
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.
Temperature Differences
Cassette
-1.5
-2.5
3.5
Discharge temp. [°C]
Start control
Ceiling Duct D2
-1.5 -2.0
-2.5 -3.0
2.5 2.5
>15°C 15°C
Cool start Warm start
23
CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5
Unit: °C
Duct D3
-2.0
-3.0
2.5