Dip Switches And Jumper Selection - Midea PTAC Series Service Manual

5.5.2.1 The Electric heater operates as below:
a.When T1＜Ts-2℉, the fan motor operates, and 3 seconds later, the heater is on and operates at low speed
within 30 seconds. After 30 seconds, it will change to the setting speed. If the DAHT temperature checked is
higher than the protection temperature, when the heater operating, the fan motor will be off automatically.
b. When T1≥Ts+2℉, the heater is off, and the fan motor keeps on working at setting speed. If the DAHT temperature
checked is low than the protection temperature, and the operation time of fan motor is more than 15 seconds, then
the fan motor will be off. If the T2 protection gets started, the fan motor also does not work.
The
5.5.2.2 Heat pump operates as below:
The Heat pump's operation mode is in accordance with the way of compressor's working. The compressor is on (electric heater
is off), the fan motor operates according to the anti-cold wind of heat pump. The four-way valve always keeps on. When T1<Ts-2
℉, the compressor is on, and when T1≥Ts+2℉,it will be off. The fan motor works according to the operation of compressor. If
T2>TE7, the compressor is off by force. When the DAHT protection gets started, it is not allowed that the compressor operates.
5.6

Dip switches and Jumper selection

Note: This Switch board is optional.
Dip Switches configurations and functions of each dip switch
position.
(See Figure and Table 1 as below)
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