Electrical Control Function
Electrical Control System 185
For other models:
-2
T1-Ts-∆T
-3
High
Low
-5
Medium
-4
1.3.3.4 Defrosting mode：
For 12k models:
Condition of defrosting:
----T4＞0℃,
Defrosting starts when either of the following ①&②:
①The units run with T3＜3℃ for 40 minutes and T3 keeps lower than TCDI℃ for more than 3 minutes.
②:The units run with T3＜3℃ for 80 minutes and T3 keeps lower than (TCDI+2)℃ for more than 3 minutes..
----T4＜0℃,
If ①and ② are satisfied, then the program judges if T2 has decreased more than 5℃.When T2 has
decreased more than 5℃, enter the defrosting mode.
----No matter what value of the T4 is and whether the T2 drops more than 5℃ or not, if the machine runs
with T3＜3℃ for more than 120 minutes and T3 keeps lower than (TCDI+4)℃ for more than 3 minutes, the
machine will enter defrosting mode.
Condition of ending defrosting:
If any one of the following items is satisfied, the defrosting will finish and the machine will turn to normal
heating mode.
----T3 rises to be higher than TCDE1℃.
----T3 keeps to be higher than TCDE2℃ for 80 seconds.
----The machine has run for 10 minutes in defrosting mode.
Defrosting action：
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