Mitsubishi Heavy Industries FDT71VNXVD Service Manual page 25

Drain pan ON/OFF output control (optional) (Models 125 ∼ 140 only)
(j)
1) Drain pan heater ON conditions
When all of following conditions are met, the drain pan 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
2) Drain pan heater OFF conditions
When either one of following conditions is met, the drain pan 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
Drain pan heater ON
Drain pan heater OFF
3 5
Outdoor air temperature (ºC) [Tho-A]
- 25 -
'10 • PAC-SM-137A