LG LZ-H015GBA2, Руководство по обслуживанию

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Troubleshooting
(304) Breakdown mode 4: Ventilation system does not work. It works abnormally.
Checklist table(table 4) of ventilation system.
• Connecting failure in control circuit
connector or fan related connector
• No power on ventilation system, or
incorrect power
• Central control is set in ventilation
system
• Incorrect terminal plate for
connecting to external signals
• No input of external equipment
signals
• Power failure
• When the option switch No.5 is set
ON and air temperature is below
-10°C or above 45°C
• When air temperature ranges below
-10℃, supply fan stops to prevent
the heat exchanger from freezing.
• When ducted with Multi V air
conditioner(made by this company)
by interlocking, the air conditioner
stops in case of defrosting.
• Displayed power saving operation
• Displayed intermittent operation
(40~45℃)
No. Details Possible Causes Necessary actions
• Check the connection of control circuit
connector and lead line connecting connector
• Check the power
• Check LOCK of central control and address
of ventilation system
• Check the connection of external control
terminal(CN-AIR)
• Check the external equipment
• If main power is disconnected by remote
controlling during ventilation system
operation, ventilation system operates.
(normal condition with no errors)
• Normal condition with no errors
• Normal condition with no errors
• Normal condition with no errors
Fan does not operate.
failure in fan operation
No interlocking to
external equipment (air
conditioner)
Ventilation system
operated by main
power
Frequent stop of air
changing fan
Frequent stop of air
changing and
ventilating fans
1
2
3
4
5