Panasonic Cs W50bd2p Cu V50bbp8 Cu W50bbp8 Repair Manual

19 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...

20.1. Test operation
 
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Always be sure to use a properly-insu lated tool to operate
the switch on the circuit board. (Do not use your finger or a
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 6 hours.
(The crankcase heater will become energized, which will
warm the compressor and prevent liquid compression.)
 
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For three-phase...

20.3. Test operation using the wired remote control
43 

44 

O
OO O
Self-diagnosis error code table
45 

21 SETTING OF SAVE ENERGY AND THERMISTOR SWITCH
21.1. Energy save setting
Open the cover remote control unit and confirm the presence of the [RP1] marking.
Energy save setting method should be different for with [RP1] marking and without [RP1] marking.
46 

22 GROUP CONTROL
1 Setting group for 1 remote control unit
 
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W hen using a remote control thermostat, the thermostat setting is used for all indoor units in the group.
 
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During group control, up to a maximum of 16 indoor units can be connected. (Do not mix heat pump units and cooling-only
units.)
 
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Do not mix manua l settings and automatic settings. (manual settings take priority.)
 
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The master unit and slave units can all be centrally...

If test operation does not proceed correctly
Carry out test operation after approximately 6 hours have passed
since the power was turned on (crankcase heater is energized). If
operation is started by using the remote control within 1 minute of
turning on the power, the outdoor unit settings will not be made
correctly and correct operation will not be possible.
If the following symptoms occur after turning on the power,
check the wiring connections once more.
 
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For standard installation...

 1. The main power is turned on while the transmission wires
between the indoor unit(s) are not connected (open circuit
at section A)
Symptom:
Nothing abnormal appears on the remote controldisplay . If
operation is then started in this condition, the combination
of the 43BB outdoor unit and the 24BD indoor unit (master
unit) will cause abnormal operation to occur.
↓
If operation continues, an abnormality will occur on the
refrigeration cycle and operation will stop.
 
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Remote control......

 1. The main power is turned on while the transmission wires
between the indoor unit and the outdoor unit are not
connected (open circuit at section A)
Symptom:
Operation of indoor unit No. 1 and indoor unit No. 3 is
possible.
However, “CHECK” flashes in the remote control unit
display for 3-5 minutes after the main power is turned on.
 
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Remote control... “CHECK” flashes
 
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Indoor unit No. 2... LED2 on the printed circuit board
flashes (both master and slave units)
 
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