Operation Of Compressor - Midea PTAC Series Service Manual

If T2＞TE7, this unit turns into the protection of compressor off , and quits this protection when T2≤TE9.
If T2＞TE8,it turns into the protection of fan motor off , and quits this protection when T2≤TE9.
If T2＞TE15, fan motor operates at low speed by force, then quits the operation and determines the
high or low speed by T4.
5.4.5. At the fan only mode, the fan always keeps on working, and the compressor/fan
motor/heater stop working.

5.5 Operation of compressor

5.5.1. The compressor operates at cooling mode as below:
5.5.2. The compressor operates at heating mode:
(There are two ways of heating mode: Heat pump and cooling/Electric heater and cooling)
The electrical heater or compressor will be activated by sensing the difference between setting
temperature and the actual ambient room temperature.
Operation condition
(T1-Ts)℉
+0
-4
T1≥Ts
compressor on
T1≤Ts-4℉
Operation condition for
heater or compressor
(T1-Ts)℉
2
-2
Compressor on
Compressor off
. compressor off
Heater(compressor) off
Heater(compressor) on
www.mideaaircon.com 12