Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 134

(10) Base heater ON/OFF output control (Option)
(a) Base heater ON conditions
When all of following conditions are satisfied, the base heater is turned ON.
・ Outdoor air temperature (detected with Tho-A) is 3ºC or lower.
・ In the heating mode
・ When the compressor is turned ON
(b) Base heater OFF conditions
When either one of following conditions is satisfied, the base heater is turned OFF.
・ Outdoor air temperature (detected with Tho-A) is 5ºC or higher.
・ When the compressor stop has been detected for 30 minutes continuously
・ In the cooling or dehumidifying mode
Base heater ON
Base heater OFF
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Outdoor air temperature (ºC)
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'19 • PAC-T-327