Panasonic S-200PE2E5 Technical Data & Service Manual page 126

Heating Mask Time
This refers to the shortest time that heating operations must be performed without defrosting operations being executed.
The mask time for this model is 25 minutes.
* Defrosting operations will not be commenced until the defrosting mask time has elapsed, even if frost adherence has
been detected.
Ending Defrosting
Defrosting operations are ended when the following conditions are aligned.
• Ending defrosting conditions
(a) When the temperature of the outdoor heat exchanger temperature sensor (C1) is 12
(b) When the temperature of the outdoor heat exchanger temperature sensor (C1) is 7
seconds.
(c) When defrosting has been initiated for 10 minutes.
9) Outdoor Unit Fan Control
(1) Cooling Mode
The appropriate rotations per minute for the outdoor unit fan are determined in accordance with the outdoor
air temperature and the frequency of the compressor inverter.
The outdoor unit fan step is controlled between a range of W1 (Step 1) and WD (Step 14).
(2) Heating Mode
The appropriate rotations per minute for the outdoor unit fan are determined in accordance with the outdoor
air temperature and the frequency of the compressor inverter.
The outdoor unit fan step is controlled between a range of W1 (Step 1) and WE (Step 15).
* However, the outdoor unit fan is halted (Step 0) when defrosting is being carried out.
10) Outdoor Unit's Electrical Expansion Valve Control
4
The electrical expansion valve controls the amount of refrigerant that is allowed to flow in accordance with the
operation status.
The valve is adjusted in accordance with the discharge temperature (TD), the outdoor heat exchanger
temperature sensor (C1), the suction temperature sensor (TS), and the indoor unit's heat exchanger
temperature sensors (E1 and E2).
(1) Cooling Mode
Controlled so that the section temperature (TS) - indoor heat exchange temperature minimum (E1 and E2)
is between 1
There are cases where the aperture opens wider than usual if the discharge temperature increases.
(2) Heating Mode
Controlled so that the section temperature (TS) - outdoor heat exchange temperature (C1) is between 1
and 5 under normal conditions.
There are cases where the aperture opens wider than usual if the discharge temperature increases.
11) Solenoid valve Control
The solenoid valve is switched on when normal operations have been halted and before and after defrosting
operations in order to stabilize differences between refrigerant pressure (reduced pressure).
There are also cases in which it is switched on at the start of operations when the outdoor air temperature is low in
order to stabilize the behavior of the oil.
(1) Normal Operations Mode
It is basically kept off, but there are cases when it is switched on for brief periods at the start of operations when
the outdoor air temperature is low.
(2) Defrosting (Heating) Operations
It is switched on for approximately 1 minute before and after defrosting operations.
(3) When Operations are Halted
Switched on for a maximum of 30 minutes in order to stabilize pressure before and after compressor operations.
and 5 under normal conditions.
4-6
or higher.
or higher for 60 consecutive