Panasonic Cs W50btp Cu W50bbp8 Cu V50bbp8 Repair Manual

26.2. 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 by the indoor unit pipe temperature sensor...

(*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.)
26.4. Hot starting
 1. Whenheating mode operation starts
 a. Start
Hot start...

 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...

26.5. Indoor unit fan control when thermostat is off during heating mode
operation
When the thermostat of the indoor unit turns off during heating mode operation, the indoor unit fan operates for 2 minutes at LOW
and then stops. In additio n, 5 minutes after the thermostat of the indoor unit turns off, the indoor unit fan operates at LOW for 10
seconds, and at 3 minutes interval after that, it switches back to LOW operation for another 10 seconds.
26.6. Excess heat dissipation for indoor unit
The indoor...

26.7. Defrost mode operation time chart
 1. Start and completion of defrosting
 a. Start
During heating mode operation (including automatic heating), after the 45 minutes of defrostingcycle time has passed,
defrosting starts if the temperature detected by the outdoor unit heat exchan ger outlet sensor is 2°C or lower continuously
for 5 minutes.
However, if the outdoor unit fan is stopped, the start of defrosting will be delaye d by 5 minutes.
Then, the defrosting cycle will be 50 minutesfrom the start of...

NOTE:If the remote control display setting temperature (To) is 29°C or higher, the heating thermostat turns
on when the room temperature is 31°C.
 2. Thermostat characteristics during dry mode.
During dry mode operation, cooling mode operation is carried out in accordance with the indoor temperature as shown in the
table below.
*When modes (2) and (3) are active, dry mode operation starts when the cooling thermostat turns on.
When modes (2) and (3) have been stopped, the 10 min./5 min. times have no...

 c. Thermostat characteristics during cooling mode and heating operation
The thermostat on/off characteristics in both operation modes are given in the table below.
67 

26.9. 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
26.10. Forced operation during restart
The...

26.12. Outdoor unit fan excess heat dissipation control
 1. When theoperation is stopped while the compressor is in operation, the outdoo r fan will run at SUPER HI fan speed for
approximately 60 seconds and then stops.
26.13. Discharge temperature control
 1. Operation
When thedischarge temperature sensor detects a temperature of 100°C or higher during cooling mode operation, the liquid
bypass valve will be turned on.
 2. Cancelling
When thedischarge temperature sensor detects a temperature of 70°C or...

27 WIRED REMOTE CONTROL INSTALLATION MANUAL
70