Panasonic EAIRC-MJ Series Service Manual

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1
Mini VRF SYSTEM
Control Functions
(1)
•
•
(2)
•
4. Other Control
4-1. Indoor Unit Self-Separator Oil Recovery Control
Refer to the indoor unit special control item.
5. Operation of Solenoid Valves
5-1. 4-way Valve Control
OFF conditions
At Cooling mode
Special control (reverse cycle start control, inter systems refrigerant oil recovery control, reverse cycle defrost
control) is in effect.
ON conditions
At Heating mode
MOV1 position (pulses)Heat exchanger status Remarks
Condenser
480
Maximum flow control
Cooling
operation
Indoor Unit
Stop
480 –
Evaporator 65 – Less than 480 SH (super heat) control
Heating
operation
Stop
0
Operation of the electronic control valve during normal unit operation
*
6. Outdoor Unit Electronic Control Valve (Motor Valve) Control [MOV1]
6-1. Power Initialization
The valve position is 480 pulses if the indoor unit has not started once after the power was turned ON.
SH control controls the difference between outdoor heat exchanger liquid temperature and suction
temperature to 1 – 5°C.
–
5-2. Refrigerant interception valve [O2*] *O2 valve is the local supply parts.
This valve works when the outdoor unit receives signal of the refrigerant leakage from the indoor unit.
The indoor unit that transmits the signal of the refrigerant leakage gives “P14” alarm.
To activate this function, it is necessary to set it to EEPROM on the main outdoor PCB and indoor PCB.
EEPROM setting in main outdoor unit
CODE: C1
Setting No.
Setting No.
0
0
1
1
2
This function invalid (factory preset mode)
This valve is turned OFF when the system is normal.
This valve is turned ON when the outdoor unit receives signal from the indoor unit.
This valve is turned ON when the system is normal.
This valve is turned OFF when the outdoor unit receives signal from the indoor unit.
EEPROM setting in indoor unit
CODE: 0B
Function of EXCT plug short-circuit
Indoor unit does thermostat OFF
(factory preset mode)
Indoor unit gives “P14” alarm and transmits the refrigerant leakage signal.
4. Other Control
5. Operation of Solenoid Valves
6.
Outdoor Unit Electronic Control Valve (Motor Valve) control [MOV1]
SM830195-04_Mini VRF SYS.indb 12 15/03/10 17:47:35

Panasonic EAIRC-MJ Series Specifications

General

Brand	Panasonic
Model	EAIRC-MJ Series
Category	Air Conditioner
Language	English