Panasonic Cs W50bb4p Cu V50bbp8 Cu W50bbp8 Repair Manual

(When float switch is continuously off)


25.3. Freezing prevention control
 1. Operation
During cooling mode operation, after 9 minutes have passed since the compressor turned on, the outdoor unit will stop its
operation when the temperature detected by the indoor unit pipe temperature sensor is 2°C or lower.
The indoor unit continues operating at the fan speed set by the remote control. (The remote controldisplay does not change.)
 2. Cancelling
This control is cancelled when the temperature detected...

25.4. Heating mode operation time chart (Heat pump type)
(*2)
Outdoor unit fan control during heating mode operation
When the compressor is on during heating mode operation (except during defrosting and when the liquid bypass valve is on), the
outdoor unit fan is controlled by means of input (CN2) indicating whether the contact of the heating pressure switch on the outdoor
unit circuit board is open or closed.
(At the start of heating mode operation, the fan operates at HI speed.)
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25.5. Hot starting
 1. Whenheating mode operation starts
 a. Start
Hot start control commences when heating mode operation starts.
 b. Operation
“PREHEAT” appears on the remote controldisplay . (Other display s remain unchanged.)
The indoor unit fan stops. In additio n, during hot starting, the louvre stays at the horizon tal position (angle 0°).
 c. Cancelling
Hot starting will be cancelled when the compressor is turned on or the indoor unit pipe temperature sensor is 18°C or higher
or after 1 minute of...

 2. Whendefrosting is completed
 a. Start
Hot start control commences when defrosting is completed.
 b. Operation
“PREHEAT” appears on the remote controldisplay . (Other display s remain unchanged)
The indoor unit fan stops. In additio n, during hot starting, the louvre stays at the horizon tal position (angle 0°C).
 c. Cancelling
Hot starting will be cancelled when the temperature detected by the indoor unit pipe temperature sensor is 18°C or higher,
or after a maximum 1 minute has passed since...

25.7. Excess heat dissipation for indoor unit
The indoor unit fan continue its operation for 30 seconds after heating mode operation turns off in order to dissipa te excess heat.
 1. Whenheating mode operation has stopped
(LOWspeed for 30 seconds)
 2. Whenoperation is set to a mode other than heating by means of the OPERATION button
 3. If operation starts again during the 30 seconds mentioned at (1)
(The fan operates at LOW speed for the remainder of the 30 seconds and then hot start commences.)
25.8....

 2. Operation
 a. During defrosting, the outdoor unit turns on the compressor and turns off the outdoor unit fan and the reversing valve.
 b. The indoor unit fan operates at LOW speed for 30 seconds upon defrosting starts, After this, the indoor unit fan turns off until
defrosting is completed.
(During defrosting, the louvre of the indoor unit stays at horizon tal position).
25.9. Indoor thermostat characteristics
 1. Thermostat characteristics during cooling and heating modes.
Operation modeSetting...

 b. Thermostat characteristic when switching between cooling and heating mode operation
Switching between cooling mode and heating mode operation is carried out as shown in the table below.
However, during automatic changeover operation, the operation will not change within 10 minutes after the thermostat has
switched off, either cooling mode or heating mode.
(The 10 minutes timer will be cancelled when operation is changed to other modes (manually) or when operation stops and
the thermostat turns on.)...

25.10. Indoor unit fan control
 1. Fixing at LO, MED or HI
When LO, MED or HI isset, the relay switches and operation is carried out at that setting.
 2. Automatic fan speed
When set toAUTO, the indoor unit fan operation changes as shown in the table below.
(Indoor temperature) - (Setting temperature) (Units: K)
Mode / Fan SpeedHIMEDLO
Cooling+3 or higher+1.5 ~ 3Less than +1.5
Heating-3 or lower-1.6 ~ - 3More than -1.5
FanMED irrespective of temperature
25.11. Forced operation during restart
The...

 2. During initial operation
When the OFF/ON button is pressed to start the operation, the louvre moves through one full cycle, and then swings
automatically (if AUTO has been set using the remote control) or moves to the setting angle (ifMANUAL has been set using
the remote control).
 3. Whenoperation stops
When the OFF/ON button is pressed to stop the operation, the louvre moves through one full cycle, and then stops in the down
position, regardless of the remote control setting.
 4. When thermostat is...

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