Panasonic CS-ME5SD3UA, Service Manual, Page: 32 / 74

32
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.