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Only for training and service purposes
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3.5 Pressure switch
- Main has pressure sensing switch in series between compressor and power relay.
- The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch
the connecting terminal with hand nor short two wires directly.
3.4 Phase detection
n Power lines are connected correctly like follow case, product do not work and display error no.
Case 1) Missed connect 1 or more phase line.
Case 2) N phase line is incorrectly connected.
Function
h The error occur 2 or more unit of the series at the same time, only a small unit number will be displayed.
Example) Master and Slave2 occur error no. 50, ʻ501ʼ display on the 7segment.
* Master: ***1, Slave1:***2, Slave2:***3, Slave3:***4
Case
Terminal block
Error No.
R S T N
Missed Phase
X
50
X
X5
X25
Reversed Phase
N
50
N
N5
N No error
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