Monitoring System - Huawei FusionModule1000A20 Maintenance Manual

FusionModule1000A20 CT Solution
Maintenance Guide
Main
tenan
ce
Item
Ther
mal
expan
sion
valve
Sight
glass
a. The superheat degree is the saturation temperature minus the temperature where the
sensing bulb is installed. Measure the pressure at the needle valve for the suction pipe and
find out the saturation temperature by using the measured pressure as an approximate
pressure inside the evaporator.

3.6.3 Monitoring System

Table 3-16 Semi-annual maintenance checklist for the monitoring system
Check
Item
Smart ETH
gateway
Issue 01 (2019-02-25)
Operation Check Standard

Check the The sensing bulb is secure.
soldering
 No fracture exists on the
points on the
sensing bulb and valve
sensing bulb
capillary tubes.
and the
 No crack exists in the
equalizer
equalizer pipe soldering
pipe.
points.
Check the The color is not yellow.
color of the
sight glass.
Check No bubble exists in the sight
whether glass.
bubbles exist
in the sight
glass.
Operation Check Standard
Power input Input voltage:
45–55 V DC
Power output Output voltage:
45–55 V DC
PWR Steady on: The
indicator power supply is
normal.
Off: No power
supply is available.
Copyright © Huawei Technologies Co., Ltd.
3 Routine Maintenance
Troubleshooting
For details, contact Huawei
technical support.
If the color is yellow, there is
too much water in the system.
Contact Huawei technical
support.
If you find air bubbles with
the sight glass, the cooling
system lacks refrigerant.
Adjust the expansion valve or
fill in refrigerant.
Troubleshooting
Check the input power cables if the
input voltage is abnormal.
For details, contact Huawei technical
support.
Check the input power cables.
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