McQuay MicroTech MAG, Установка и обслуживание данных

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IM620-1 9
3. The amber (“Active”) LED remains on for 1 second and off for 1 second when communications
exists between the MAG and the absorption chiller. If the LED is on for
2 /
10
of a second and off for
2 /
10
of a second, this indicates that communications between the MAG and the absorption chiller
does not exist.
If the above sequence does not occur after power is applied to the controller, there is a problem with
the MCB or its power supply. For more information, refer to the “Test Procedures” section of this
manual, which is under “Service Information.”
Tables 3 and 4 summarize the green, red, and amber status LED indications.
Table 3. Green and Red Status LED Indication
Green LED State Red LED State Indication
Off Off No power to MCB
Off On* Self-test failure or power supply
problem
On Off MCB operating normally
* For longer than 5 seconds.
Table 4. Amber Status LED Indication
Amber LED State Indication
On 1 second
Off 1 second Communications exists between the MAG and the absorption chiller
On
2
/
10
second; Off
2
/
10
second Communications does not exist between the MAG and the absorption
chiller
Hex Switches
The MCB includes two hex (hexadecimal) switches that are used to set the MAG controller’s network
address.
The HI and LO hex switches are shown in Figure 3. A “hex switch setting” is defined as the HI switch
digit followed by the LO switch digit. For example, a hex switch setting of 2F would have the HI switch
set to “2” and the LO switch set to “F.” Refer to “Addressing the Controllers” in the “Network
Commissioning” section of this manual for more information.
Note:
You can change the setting of a hex switch with a slotted-blade screwdriver that has a 3 /
32-
inch
tip. If a hex switch setting is changed, power to the MCB must be cycled in order to enter the new
setting into memory. This can be done by turning the panel’s power switch off and then back on.
Figure 3. Hex Switches Showing 01 Setting
1
2
3
0
4
5
6
7
8
9
A
B
C
D
E
F
1
2
3
0
4
5
6
7
8
9
A
B
C
D
E
F
HI (left) hex switch LO (right) hex switch