Airwell PNX DCI Nordic, Руководство по обслуживанию

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12-6
TROUBLESHOOTING
SM PNXDCI 1-A.1 GB
No Fault Probable Cause Corrective Action
4 DC under/over Voltage
Electronics HW prob-
lem Check outdoor unit pow-
er supply voltage
5 AC under Voltage
Check outdoor unit pow-
er supply voltage
6
Indoor / Outdoor unit
Communication mis-
match Indoor and Outdoor
controllers are with
different versions
Replace Indoor controller
7 No Communication
Communication or
grounding wiring is not
good.
Check Indoor to Outdoor
wiring and grounding
8 Compressor Lock
Switch unit to STBY and
restart
9 Bad Communication
Communication quality is
low reliability Check Indoor to Outdoor
wiring and grounding
12.4 Judgment by MegaTool
MegaTool is a special tool to monitor the system states.
Using MegaTool requires:
A computer with RS232C port. •
A connection wire for MegaTool. •
A special MegaTool software. •
Use MegaTool according to following procedure: •
Setup MegaTool software: copy the software to the computer. •
Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit controller by the •
connection wire.
Run the software and choose the COM port, you can monitor the A/C system state
•
In monitor tab •
12.5 Simple procedures for checking the Main Parts
12.5.1 Checking Mains Voltage.
Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this range,
abnormal operation of the system is expected. If in range check the Power (Circuit) Breaker and look
for broken or loosed cable lugs or wiring mistake(s).
12.5.2 Checking Power Input.
If Indoor unit power LED is unlighted, power down the system and check the fuse of the Indoor unit.
If the fuse is OK replace the Indoor unit controller. If the fuse has blown, replace the fuse and power
up again.
Checking Power Input procedure for the Outdoor unit is the same as with the Indoor unit.
12.5.3 Checking the Outdoor Fan Motor.
Enter Test Mode (where the OFAN speed is high)
Check the voltage between lead wires according to the normal value as following:
Between red wire and black wire: /- 20V
Between orange wire and black wire: 15VDC +/- 1V
Between yellow wire and black wire: 2-6VDC