Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 335

(c) Base heater ON/OFF condition
After the compressor stop, the base heater ON/OFF changes the control method by the outdoor air temperature 〔 Tho-A 〕 .
(i) When the outdoor air temperature is A territory
After the compressor stop, the base heater is always turned ON.
(ii) When the outdoor air temperature is B territory
(ii-1) After it passed for 8 minutes 30 seconds from the compressor stop, the base heater is turned OFF.
(ii-2) (ii-1) later, after it passed for 8 hours from the compressor stop, the base heater is always turned ON.
(iii) When the outdoor air temperature is C territory
After the compressor stop, the base heater is always turned OFF.
Outdoor air temperature (°C) 〔 Tho-A 〕
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