WH-SDC03H3E5-1, WH-SDC05H3E5-1, WH-SDC07H3E5-1, WH-SDC09H3E5-1, WH-UD03HE5-1, WH-UD05HE5-1, WH-UD07HE5-1, WH-UD09HE5-1 - Panasonic Air Conditioner Service Manual Simplified (repair manual). Page 117

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12.13 Outdoor Ambient Thermo OFF Control 
 Purpose 
o  Stop provides heating to room side during high outdoor ambient condition. 
 
ON
OFF
Outdoor thermo off
set temperature +3°C
Outdoor thermo off
set temperature +1°C
 
 
 Control 
content 
o  Heating outdoor ambient thermos OFF control only applicable when heat pump operate in heat mode. (This 
control will not activate when running in tank side) 
o  Heat pump and water pump will turn OFF when outdoor ambient is higher than outdoor thermo OFF set 
temperature. 
o  Heat pump thermos ON when outdoor ambient < outdoor thermos OFF set temperature + 1°C. 
12.14 Alternative Outdoor Ambient Sensor Control 
Purpose of the Alternative Outdoor Ambient Sensor: 
  It is some possibility that the air to water heat pump unit will install at a location where the original ambient sensor 
is expose to direct sunlight. Therefore, another optional ambient sensor can be connect to indoor PCB and locate 
at new and better reading location to improve the heat pump performance. 
 
Control Detail: 
  Remocon can select either the extra outdoor ambient sensor is connected or not. (YES/NO) 
  The alternative outdoor ambient sensor will connect to indoor unit main PCB terminal. 
 
o  when alternative sensor select NO 
-  Original Outdoor temperature sensor will use for Indoor & Outdoor heat pump operation reference sensor. 
-  Data communication direction : OUTDOOR send outdoor temperature reading to INDOOR. 
-  Error judge : OUTDOOR will judge the original outdoor sensor error (F36 display if error detect). No 
judge error on alternative outdoor sensor 
 
o  when alternative sensor select YES 
-  Alternative Outdoor temperature sensor will use for Indoor & Outdoor heat pump operation reference 
sensor. 
-  Data communication direction : INDOOR send outdoor temperature reading to OUTDOOR. 
-  Error judge : INDOOR will judge the Extra outdoor sensor error only after operation ON request received 
from remocon. 
(F36 display if error detect). No judge error on original outdoor sensor. 
 
 
 
 
 
 
 
 
 
 
 
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