Liebert DM Series, Руководство пользователя

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28 Chapter 3 Electrical Installation
DM Series 16kW Air Conditioner User Manual
4. The ratings of the circuit breakers and fuses are correct.
5. The control cables are properly connected.
6. All the cables connections are fastened, with no loose screws.
You can start commissioning after confirming the preceding points.
3.3.4 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 3-6) on the fan speed controller board. See Table 3-4 for the functions of
indicators.
Table 3-4 Functions of indicators
Silk print Definition Color State Function
D16 Power indicator Green
On
The CPU circuit of fan speed controller board is
supplied with 5V power
Off There is a faulty on fan speed controller board
D22 Run indicator Green
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
D15
Power switch controlling
indicator of AC contactor
Red
On
The control switch which supplies the AC contactor
with the driving power is open
Off
The control switch which supplies the AC contactor
with the driving power is closed
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 3-5, provide the HMIs for maintenance personnel. Refer to
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for the detailed operations of keys and LCD HMI.
Table 3-5 Function descriptions of keys and LCD
NO. Function Description
1
Inquire the acquisition
data in real time
The inquiried acquisition data includes condensing pressure, environment temperature, SCR
temperature, output percentage
2
Inquire the current
alarm data in real time
The inquiried current alarm data includes phase loss alarm, SCR over temperature, fan 1 over
temperature, fan 2 over temperature, pressure sensor failure, EEPROM read fault alarm, SCR
temperature sensor failure and abnormal frequency
3
Inquire the historical
alarm data in real time
The present 100 historical alarms saved can be inquiried
4
Change the configured
parameters in real time
The changeable configured parameters include running pressure, pressure controlling range,
minimum voltage, maximum voltage, fan number, pressure sensor type; or resume the default
values
The keys and LCD are on the upper right corner of the fan speed controller, as shown in Figure 3-6. Their appearance
is shown in Figure 3-7.
LCD
ENT key
DOWN key
ESC key
UP key
Figure 3-7 Keys and LCD