Hmi - Liebert LSF24 User Manual

10 Chapter 3 Application Of Fan Speed Controller
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J5 (Out Temp)
J11 (RS232)
J7 (Fan1Sta)
J10 (Fan2Sta)
J6 (CompSta)
Note :
J8 (SCRTemp) in Figure 3-1 is the interface of fan speed controller board, and not to be used by users

3.2 HMI

The fan speed controller can realize the HMI function through indicators, RS232 serial communication port, keys and
LCD.
Indicators
There are three indicators (see Figure 3-1) on the fan speed controller board. See Table 3-2 for the functions of
indicators.
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D16 Power indicator
D22 Run indicator
Power switch controlling
D15
indicator of AC contactor
RS232 serial communication port
RS232 serial communication port provides a port to interface the computer using factory-defined protocol. It is used in
factory commissioning and maintenance.
Keys and LCD
The keys and LCD, which can realize the functions in Table 3-3, provide the HMIs for maintenance personnel. Refer to
3.3 Operation Description Of HMI for the detailed operations of keys and LCD HMI.
NO. Function
Inquire the acquisition
1
data in real time
Inquire
2
alarm data in real time
Inquire
3
alarm data in real time
Change the configured
4
parameters in real time
Definition
Input terminal of environment temperature
sensor (spare)
Serial communication interface (used for
maintenance)
Detecting terminal of fan 1 over temperature
state
Detecting terminal of fan 2 over temperature
state
Detecting terminal of compressor state
Table 3-2 Functions of indicators
Definition Color
Green
Green
Red
Table 3-3 Function descriptions of keys and LCD
The inquiried acquisition data includes condensing pressure, environment temperature, SCR
temperature, output percentage
The inquiried current alarm data includes phase loss alarm, SCR over temperature, fan 1 over
the current
temperature, fan 2 over temperature, pressure sensor failure, EEPROM read fault alarm, SCR
temperature sensor failure and abnormal frequency
the historical
The present 100 historical alarms saved can be inquiried
The changeable configured parameters include running pressure, pressure controlling range,
minimum voltage, maximum voltage, fan number, pressure sensor type; or resume the default
values
Liebert PEX Condenser User Manual
Pin 1: input terminal of temperature signal
Pin 2: signal ground
Pin 1: communication ground
Pin 2: reception terminal of communication
Pin 3: transmission terminal of communication
Pin 1: output terminal of 19V AC signal
Pin 2: return terminal of 19V AC signal
State
The CPU circuit of fan speed controller board is
On
supplied with 5V power
Off There is a faulty on fan speed controller board
On or off There is a faulty on fan speed controller board
Blinking at 1Hz (slowly) The system is running normally without alarm
Blinking at 5Hz (quickly) There is an alarm or the compressor is shut down
The control switch which supplies the AC contactor
On
with the driving power is open
The control switch which supplies the AC contactor
Off
with the driving power is closed
Description
Definition of pins
Function