McQuay MicroTech MAG, Установка и обслуживание данных

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30 IM620-1
Figure 17. Direct Connect MAG Schematic
To BAS Integrator
or
Personal Computer
To "Line" input on
Absorption Chiller
Unit Controller
1
Test Procedures
A listing of MicroTech related part numbers is included in the “Parts List” section of this manual. If
the MCB must be replaced, refer to the “MCB Replacement” section of this manual.
Status LED Diagnostics
The MCB status LED indications can aid in controller diagnostics. If the status LEDs do not operate
normally as described in the “Component Data” section of this manual (see Tables 3 and 4), there is a
problem with the MCB. Following are troubleshooting procedures for the various symptoms.
Red LED Remains On
If the red LED remains on after the 5-second self-test period, it is likely that the MCB is defective.
However, this can also occur in some instances if there is a power supply problem. Refer to
“Troubleshooting Power Problems” below.
Red and Green LEDs Off
If the red and green LEDs do not turn on after power is applied to the controller, there is likely a
defective component or a problem in the controller’s power distribution circuits. Refer to
“Troubleshooting Power Problems” below.