Panasonic Cs W50bb4p Cu V50bbp8 Cu W50bbp8 Repair Manual

21.1. Energy save setting
 
    • 
• •  • 
Upper and lower limit can be set for the setting temperature
during cooling and heating operation. (The factory shipment
setting has an upper limit of 31°C and a lower limit of 16°C.)
 1. While operation is stopped, press theTEMP UP and TEMP
DOWNbuttons simultaneousl y.
 2. To set an upper limit
Press the OPERATION button until HEAT is display ed.
↓
Press the TEMP UP or TEMPDOWNbutton to set the
temperature.
↓
Press the SET button to complete the upper limit...

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

If test operation does not proceed correctly
Carry out test operation after approximately 12 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.
 
    • 
• •  • 
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 control
display . If operation is started in this condition, the
combination of the 50BB outdoo r unit and the 14BB4
indoor unit (master unit) will result in abnormal
operation.
↓
If operation continues, an abnormality will occur on the
refrigeration cycle and operation will stop.
 
    − 
− −  − 
Remote control... “CHECK”...

 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 controldisplay
for 3-5 minutes after the main power is turned on.
 
    − 
− −  − 
Remote control... “CHECK” flashes
 
    − 
− −  − 
Indoor unit No. 2... LED2 on the printed circuit board
flashes (both master and slave units)
 
    − 
− −  −...

 1. Automatic address setting (don’t need to set dip-switch)
If the wiring is connected properly as above example, the
address is set automatically by the main powersupply . An
indoor unit with remote control will be set as the master. If
the power source is installe d to indoor units and outdoo r
units separately, turn on the switch by following the
procedure: outdoor unit, then indoor unit with control, and
finally other indoor units.
When theslave units do not operate (when address cannot
be set)
 1....

Reset the address by following the procedure:
 a. Make sure that dip-switches No. 1 to 4 and No. 8 are
OFF, stop the operation.
 b. Simultaneously, push buttons “AIR SWING AUTO”,
“OPERATION ” and “A/C No.”. The address will be reset
and new address will be set.
Important:The address for the Twin/Triple control cannot
be reset, using the above mentioned
procedure.
 2. Manua l address setting (by dip-switchDSW1)
Whensetting the address manua lly, set the dip-switch of
the PC board of the indoor unit as...

Emergencyoperation
 
    • 
• •  • 
Emergency operation of outdoor unit
Emergency operation can be carried out by setting the
DSW1 switch on the printed circuit board of the outdoor
unit to the EMERGENCY position. However, emergency
operation is only carried out when an abnormality is
detected by the indoor/outdoor temperature thermistors.
The resistance values of each thermistor are measured
as shown in the table below to determine if there is an
abnormality.
Thermistor resistance table
Temperatu...

25 CONTROL
Description of basic Functions
25.1. Cooling mode operation time chart
(*1)
Outdoor unit fan start control during cooling
At the start of cooling mode and drying mode operation, the outdoo r unit heat exchan ger outlet temperature is detected in order
to set the fan speed.
Operation is carried out at the fan speed detected for 30 seconds.
After 30 seconds, the heat exchan ger outlet temperature is detected and the outdoo r unit fan speed is changed automatically .
(*2)
Cooling low outdoor...

25.2. Drain pump control
 1. Basic operation
During cooling mode, dry mode or defrost mode operation, the drain pump turns on when the compressor turns on. (The drain
pump turns on during freezing prevention control.)
 
    • 
• •  • 
W hen the compressor turns off, the drain pump will still continue its operation for 6 more minutes.
 
    • 
• •  • 
If the drain pump is running when operation stops or when the operating mode is changed, the drain pump will still continue
its operation for 6 more...