Panasonic U-4LE1E5 Service Manual page 23

9. Indoor Special Control
9. Indoor Special Control
9-4. Drain Pump control
CCU intervenes in drain pump control of the indoor unit according to the setting in EEPROM in the outdoor unit.
The drain pump operates from CCU control at the following condition.
- DP counter 5
* The DP counter counts each oil recovery control.
- Liquid temperature (E1) in the indoor unit which selected cooling mode < 0 °C
* Regardless of operating / stopped.
- Low Silhouette Ducted type indoor unit
In Low Silhouette Ducted types, dirt might be accumulated when water collects in the drain pan for a long
term. Therefore, the drain pump works longer to drain water surely.
* To activate this function, it is necessary to set it to EEPROM on the main outdoor PCB.
EEPROM setting of drain pump in main outdoor unit
CODE: 0C
Setting No.
0 Invalid
1 DP operates for 20 minutes and stops for 2 hours
2 DP operates for 20 minutes and stops for 20 minutes
3 DP always operates
4
DP operates for XX minutes when indoor unit's operation
changes;
from thermostat ON
5
DP operates for XX minutes when indoor unit's operation
changes;
from thermostat ON or thermostat OFF
6 Both Setting No. 4 and 5 functions.
7 DP operates for XX minutes when indoor unit's operation
(Factory changes
preset from thermostat ON or thermostat OFF
mode)
*When setting No. 4 – 7 is selected, this function works only for below indoor unit types.
Types : F1, F2, M1, E1
*Operating time mentioned "XX" above is able to set in EEPROM of the main outdoor unit
EEPROM setting in main outdoor unit
CODE: 2B
Setting No.
20 20 minutes
30 30 minutes (factory preset mode)
40 40 minutes
50 50 minutes
60 60 minutes
* The drain pump always operates when the indoor unit is thermostat ON in cooling operation.
* Once the drain pump operates, it keeps operating for 20 minutes.
In the above 2 cases, the drain pump operates by the signal of indoor PCB, not by CCU.
Description
thermostat OFF or operation stopped.
operation stopped.
operation stopped.
XX
1 - 17
Mini VRF SYSTEM
Mini VRF SYSTEM
Control Functions
Control Functions
Indoor unit under this control
All units
(Mode, Operation / Stop
Thermostat ON / OFF
doesn't concern)
Cooling mode
Dry mode
Heating mode
Cooling mode
Dry mode
1