Chapter 3 Disassembling Electrical Parts 9
Liebert.PEX+Series Precision Air Conditioner Dissassemble Manual
3.3 Disassembling cables of #2 system fan
There are 3 steps to disassemble the cables of #2 system fan: Disassembling fan speed regulation signal cables,
disassembling the power cables of fan, and disassembling the fan alarm signal and RS 485 cables, as shown in A, B
and C in Figure 3-2.
C
B
2#风机调速信号
2#风机报警信号
2#风机485信号
(VSC03Z专有)
2#风机功率电缆
A
＃
2 fan speed regulation signal
Power cables of
＃
2 fan alarm signal of
＃
2 fan
RS 485 signals of
＃
2 fan
(dedicated for VSC03Z)
Figure 3-2 Illustration for #2 system fan cables
Note
In A, the cables labeled with “ECF1-33” and “ECF1-34” are the RS485 signal cables of #1 system fan, and if
the unit has the non-VSC03Z fan speed regulation board, do not connect the cables, during disassembly, no
need to disassemble these cables;
In B and C, the terminals with the same label have the same voltage potential, and the cables of the #1 system
fan and those of #2 system fans must be differentiated strictly. Differentiate them according to the unit
conditions during disassembly operations.
3.4 Disassembling the cables of stage 1 electric heater
There are two steps for disassembling the cables of stage 1 electric heater, including disassembling the power cables
of the electric heater and disassembling the signal cables of the electric heater, as shown in A and B in Figure 3-3.
A
B
电加热功率电缆
电加热信号电缆
Power cables of electrical heater Signal cables of electrical heater
Figure 3-3 Illustration for the cables of the stage 1 electric heater
Note
In B, the power cables of the stage 1 electric heater have two colors of red and blue. The red cables are hot
cables and the blue cables are neutral cables and are connected to terminal N.
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