LG ACHH Series Manual page 46

The phenomena from main component failure
Alarm
An explanation regarding a failure is as following below
CH x x xxx
Failure code
CHxx001
CHxx003 In case where the communication between HMI and a chiller controller is not performed for 30 seconds.
In case where the communication between a controller and a cycle control box is not performed for
CHxx005
After a communication of a remote control bus status at first, the communication between external equip-
CHxx009
When the pump contact input is off for 3 seconds when starting or during operation and this condition
CHxx011
This displays the alarm code
This displays the alarm cycle number. (0-3)
0: Common alarm
1: Alarm of cycle 1
2: Alarm of cycle 2
3: Alarm of cycle 3
This displays the unit number and current product is fixed to 1.
Control when occurring
Open/Short of an air temperature sensor
Product stop
Product stop
Communication error with a cycle control box
Product stop
ment and a modbus is not performed for 30 seconds.
Product stop
Load water pump interlocking error
occurs 3 times within one hour, or pump contact input is off for more than 9 seconds.
Product stop
Failure name
Occurrence condition
Air temperature sensor error
Automatic return to a normal condition
HMI communication error
Automatic return to a normal condition
30 seconds.
Automatic return to a normal condition
Remote communication error
Automatic return to a normal condition
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Removal condition
HMI Reset button press