Panasonic Cs W50btp Cu W50bbp8 Cu V50bbp8 Repair Manual

41 

19.1. Twin and Triple Operation
 
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• •  • 
Simultaneous air conditioning of wide spaces and corners is
possible. Indoor units with different horsepowers can even
be used in combination.
 
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• •  • 
The master unit and slave units are set automatically when
the power is turned on. At this time, the indoor unit which is
connected to the remote control unit becomes the master
unit.
(If automatic setting is not possible, carry out the settings
manua lly.)
 
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• •  • 
No distinction is made...

19.1.2. Automatic address setting fortwin
and triple systems
Procedure: Turn on the power supply for the indoor
and outdoor units.
Operation: Automatic address setting will start 10 to
30 seconds after the power supply is
turned on, and will be completed after
about 1 minute.
If the power supplies for the indoor unit and outdoor unit cannot be
turned on at the same time, turn on the power supply for the outdoor
unit, the indoor unit which is connected to the remote control, and then
the other indoor...

 
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• •  • 
The indoor units will not run for approximately 1 minute
while automatic twin/triple address resetting is being carried
out.
Note: 
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• •  • 
Do not turn off the power supply for at least 1 minute after
automatic twin/triple address resetting has been carried out.
19.2. Piping connections
 
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• •  • 
The following table shows the pipe diameters for a twin-type system.
Outdoor unit main pipe diameter (mm)Indoor unit combinations
3HPIndoor unit capacity (HP)1.51.5
Liquid side:ø...

19.3. Refrigerant charging
 
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• •  • 
For twin and triple-type systems
The pipe length is the total of the branch pipe (L) and the junction pipes (la→
lb→
lc in order from the thickest diameter). At
the point where the pipe length exceed s 30 m, determine the amoun t of refrigerant for the remaining liquid-side pipe diameters
and pipe lengths from the following table in order to charge the system.
45 

19.4. Wiring
46 

20 WIRING MISTAKE PREVENTION
Improved quality of installation work through adoption of an “Connection error prevention” circuitwhichpreven ts wiring
mistakes
Conne ction errors with the control wires and the power supply wires will not only contribute to burning-out of the control circuit
board, but can also cause large-scale working losses and affect reliability. If a circuit board with a “Connection error prevention”
circuit is used, the relay will not operate if the wires have been connected...

21.1. Test operation
 
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• •  • 
Always use a properly-insu lated tool to operate the switch
on the circuit board. (Do not use your finger or any metallic
object).
 
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• •  • 
Never turn on the power supply until all installa tion work has
been completed.
 
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• •  • 
Turn on the circuit breaker before test operation extends
past 12 hours.
(The crankcase heater will be energized, which will warm
the compressor and prevent liquid compression.)
 
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• •  • 
For three-phase models, check...

21.4. Test operation using the
wireless remote control
 1. Within 1 minute of pressing the OFF/ON button, press to
cooling operation and then press the TEST RUN button.
 
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• •  • 
If more than 1 minute passes, test operation cannot be
started. In this case, press the OFF/ON button once
more to repeat the operation.
 
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• •  • 
Use the OPERATION button to change the operation.
The current operation mode will appear in the operation
mode display .
 2. Whentest operation starts, “TEST RUN” will...

How to display the past error message
If the “CHECK” display on the wiredremote control is not
flashing, press the CHECK button continuously for 5 seconds
or more to display the problem details for the last problem or
the problem before that. You can then switch between the
display s for the previous problem and the problem before that
by pressing the TIMERFORWARD orBACK buttons.
(Last problem display : 1F15 - 1F49
Second-last problem display : 2F15 - 2F49)
Press the CHECK button once more to return to...