WH-SXC09H3E5, WH-SXC12H6E5, WH-UX09HE5, WH-UX12HE5 - Panasonic Air Conditioner Service Manual (repair manual). Page 111

111 

1  When water pump is ON, the system will start checking flow switch status (ON/OFF). 
2  If the flow switch ON for 10 seconds, the system will check on the water inlet temperature for 10 seconds. 

If the water inlet temperature not exceeds 80°C, the water pump shall be continuously running with normal 
mode. 
If the water inlet temperature exceeds 80°C for continuously 10 seconds, the water pump will be OFF 
immediately. 

3  After water pump OFF for more than 10 minutes, it will be ON back and the indoor unit safety control 

checking is restarted. 

 

YES

YES

YES

NO to normal mode

10s

Flow SW ON?

Pump ON

Pump OFF

>10 mins

Water In > 80°C for 10s

 

1  When the power supply is cut off during the operation of Air-to-Water Heatpump, the compressor will re-

operate after power supply resumes. 

 

LED Operation 

Color Green 

Light ON 

Operation ON 

Light OFF 

Operation OFF 

Note: 

  If Operation LED is blinking, there is an abnormality operation occurs.