Panasonic CS-E18SD3UAW service manual - Page 54

Electric Heater Control 2

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12.8 Electric Heater Control 2  During Error happened, air conditioning unit will stop operation, TIMER LED will blink and indoor vane closed.  Electric heater can be switch ON when fulfill the starting condition as follow except 2 errors. o H14 (Indoor intake air temperature sensor abnormality) o H19 (Indoor fan motor mechanism lock) Starting condition When all condition (1+2+3+4) are fulfilled. 1 Operation ON 2 Indoor Heating mode 3 Error happened Except error H14 and H19 4 Temperature different control (°F) Temp difference (Remote controller setting - Intake air temperature) When air conditioning is switched ON Heater ON 3.6 Heater OFF 1.8 ON by Temp difference ≥ 3.6°F OFF by Temp difference 1.8°F Control content 1 Indoor unit will start operate when receive operation ON signal from remote controller. 2 Indoor fan speed i) For error H23 - Indoor heat exchange sensor 1 abnormality H24 - Indoor heat exchange sensor 2 abnormality H27 - Outdoor air temperature sensor abnormality H28 - Outdoor heat exchange sensor abnormality Me Fan (Fan speed higher than other error because the outdoor unit compressor will still run at preset frequency about 27Hz (H23, H24) and 40Hz (H27, H28) ii) Other errors minimum fan speed = Lo Fan 3 Once Electric heater switched ON, It will operate at least 3 minutes. 54

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54
12.8 Electric Heater Control 2
During Error happened, air conditioning unit will stop operation, TIMER LED will blink and indoor vane closed.
Electric heater can be switch ON when fulfill the starting condition as follow except 2 errors.
o
H14 (Indoor intake air temperature sensor abnormality)
o
H19 (Indoor fan motor mechanism lock)
Starting condition
When all condition (1+2+3+4) are fulfilled.
1
Operation ON
2
Indoor Heating mode
3
Error happened Except error H14 and H19
4
Temperature different control
When air conditioning is
switched ON
(Remote controller setting -
Intake air temperature)
Temp difference
3.6
ON by
Temp difference ≥ 3.6°F
OFF by
Temp difference
1.8°F
1.8
Heater ON
Heater OFF
(°F)
Control content
1
Indoor unit will start operate when receive operation ON signal from remote controller.
2
Indoor fan speed
i) For error
H23 - Indoor heat exchange sensor 1 abnormality
Me Fan
(Fan speed higher than other error because
the outdoor unit compressor will still run at
preset frequency about 27Hz (H23, H24)
and 40Hz (H27, H28)
H24 - Indoor heat exchange sensor 2 abnormality
H27 - Outdoor air temperature sensor abnormality
H28 - Outdoor heat exchange sensor abnormality
ii) Other errors
minimum fan speed = Lo Fan
3
Once Electric heater switched ON, It will operate at least 3 minutes.