Maintenance And Service; Troubleshooting Solutions - Hitachi airCloud HC-IOTGW Installation & Maintenance Manual

8. Maintenance and Service

8.1 Troubleshooting Solutions

The following table identifies possible troubleshooting solutions for abnormal conditions. Ensure the
power line is turned off before performing any checking described in the table.
If the answer of checking is yes, please check the next item in the list. If not, please carry out
action.
Item Phenomenon
Is power line correctly connected
to airCloud Gateway?
Is the power source turned ON?
Is power voltage within the
airCloud Gateway
applicable range?
does not seem to
1 be working even
after power is
Does the POWER LED light up?
applied
Is the ERROR LED indication
is ON, or in the state ON for 1
second and OFF for 1 second
(repeated)?
Is H-LINK line correctly connected
to airCloud Gateway?
Is the terminal resistance on
H-LINK wiring correctly set?
Are all addresses for the
equipment configured correctly?
Is the H-LINK wiring
disconnected?
Checking
Is all the equipment powered ON? Power ON all equipment.
2 connection never
Does H-LINK wiring meet
completes.
specification requirement?
Doesn't ERROR LED flashes
once 5 seconds (repeated)?
Does the H-LINK LED flashes
once every 2 seconds?
Is LAN cable correctly connected
to airCloud Gateway?
Is the PC and airCloud Gateway
in the same subnet?
Is DS setting on airCloud Gateway
correct?
Is the power on HUB turned ON?
Does LAN cable meet
The connection
specification requirement?
between PC
Is LAN cable (and HUB) free from
3 and airCloud
loose connections shorted wires
Gateway cannot
or other issues?
be established.
Is the H-LINK within 5-7/8 inches
of any high voltage?
Is the web browser version is
correct in PC?
Does the LAN LED stay OFF?
Table 8.1 Troubleshooting Solutions
Check
Ensure the power line is correctly connected to airCloud Gateway.
Ensure the power line is turned off to perform wiring work.
Turn ON the power source.
Check the voltage on the power supply.
Check and reconnect the wire if the voltage is out of "normal range"
(AC 100V – 240V).
If none of the above applies to the circumstances and POWER LED
still does not light up, airCloud Gateway may have an internal defect.
Contact your dealer or distributor.
airCloud Gateway may have an internal defect.
Contact your dealer or distributor.
Correctly connect H-LINK to airCloud Gateway.
Set only 1 terminal resistance on one H-LINK circuit.
Set the addresses for all equipment as outlined in the manuals.
Check the wiring connection.
Use 0.75 - 1.25mm
1,000m (3,281ft.) or shorter.
airCloud Gateway is checking connection. Please wait. If the situation
keeps more than sixty minutes, please checking wiring and address
setting on air conditioners and perform connection again.
- Ensure that the H-LINK line is correctly wired.
- If the first protecting fuse for H-LINK circuit is blown, remove the
cause and then set 2 pin on DS3 ON.
- If none of the above applies, airCloud Gateway may have an
internal defect. Contact your distributor or dealer.
Correctly connect LAN cable to airCloud Gateway.
Also check the fitting for connectors.
Refer to "5. Local Web for Firmware Update" to check IP address.
When changing DS setting, refer to "3.2.3 Switch Setting Procedures"
to check the procedure.
Turn the power on HUB ON.
Use LAN cable of category 5 or higher with length of 100m (328ft.) or
shorter.
Replace with new ones.
Provide spacing of 150mm (5-7/8 inches) or more between H-LINK
and high voltage.
Refer to "5. Local Web for Firmware Update" to confirm the web
browser version is correct.
If none of the above applies to the circumstances and phenomenon
described on the left remains, airCloud Gateway may have an
internal defect.
Contact your dealer or distributor.
29
Action
2
standard and shielded cable with a length of