Way Valve Adjustment Control - Panasonic U-8ME1E8E Service Manual

8. 4-Way Valve Adjustment Control

This control can be disabled by setting to EEPROM.
EEPROM setting in main outdoor unit
CODE: E0
Setting No
0 (factory preset mode)
1
1
2
The purpose of this control is to change over the 4-way valve appropriately with big differential pressure.
This control is performed at the following conditions.
- The first operation after turning on power supply to outdoor unit.
- The first operation after all outdoor units stopped for XX minutes.
- The mode of the system changes.
* XX is able to set in EEPROM of main outdoor unit.
EEPROM setting in main outdoor unit
CODE: 28 (for cooling mode), 29 (for heating mode)
Setting No
0
1
2
29
30
- Cooling operation
Control time
Outdoor units
MOV
Indoor RAP valve kit RAP valve kits at all indoor units operate in Cooling mode (OFF status).
units
Fan
* When the above operation is finished, normal operation starts at the horsepower determined by the indoor units
where thermostats are ON.
- Heating operation
Control time
Outdoor units
MOV
Indoor RAP valve kit RAP valve kits at all indoor units operate in heating mode (ON status).
units
Fan
* When the above operation is finished, normal operation starts at the horsepower determined by the indoor units
where thermostats are ON.
This control is performed (all indoor unit)
This control is not performed (all indoor unit)
Only type K1 is not performed
XX
60 (factory preset mode)
10
20
Interval of "10"
290
300
60 seconds
All outdoor units operate at the maximum horsepower.
MOV at all indoor units operate at a fi xed pulse according to the indoor unit capacity.
Fan operates at the set fan speed or stops, depending on the indoor unit operation
mode.
Minimum 1 min - Maximum 10 min [until max (pressure sensor temp., E1)
All outdoor units operate at the maximum horsepower.
MOV at all indoor units operate at 250 pulses as a default.
Fan operates at the set fan speed, stops or operates at a very low speed, depending on
the indoor unit operation mode.
Control Functions - Outdoor Unit
1 - 26
2WAY SYSTEM
35°C]