Special Controls - Panasonic U-4LE1E5 Service Manual

3. Special Controls

(2) Control in the Heating Mode
(2-1) Discharge temperature: less than 30°C
Control hour
1
Compressor
Outdoor unit
Elec. cont. valve* 4
Fan
Indoor unit
Elec. cont. valve* 4
(2-2) Discharge temperature: over 30°C
Control hour
Compressor
Outdoor unit
Elec. cont. valve* 4
Fan
Indoor unit
Elec. cont. valve* 4
NOTE
*1 Td: Discharge temperature
*2 HPT: High pressure saturated temperature
K: Difference in temperature (1K=1°C)
*3
*4 Elec. cont. valve: Electronic control valve
Min. 2 minutes 30 seconds to Max. 23 minutes
(Discharge degree-of-overheating: Td* 1 - HPT* 2 > 12 K* 3 )
Frequency 54Hz
250pulse (Max. 3 minutes)
Preset wind speed or fixture setting to "Stop" by indoor unit control system
480pulse
Min. 1 minute to Max. 6 minutes
(Discharge degree-of-overheating: Td-HPT > 12 K)
Frequency 22Hz
A certain pulse calculated by the outdoor air temperature and total load of indoor unit
Preset wind speed or fixture setting to "Stop" by indoor unit control system
80pulse
1 - 8
480pulse (Max. 17 minutes)
Mini VRF SYSTEM
Control Functions
300pulse (Max. 3 minutes)