LG THERMA V AHNW16606B0, Service Manual, Page: 38 / 81

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Displaying the error Caution flow: xx s
Description of error No flow
Response of internal unit
controller
-
Possible causes Disturbances in water flow.
Troubleshooting
The error is displayed in the diagnostics display:
• If it appears less than 3x in a row when the compressor is switched on, the device con-
tinues to function normally.
• Otherwise, “ERROR **NO WATER**” is displayed.
Displaying the error ERROR .Sensors
Description of error Sensor error
Response of internal unit
controller
The device automatically restarts after the error is resolved
Possible causes
• The temperature sensor is not appropriately connected to the controller.
• The temperature sensor is damaged
Troubleshooting
Check the connection of the temperature sensor PT1000:
• In case of faulty connection of the temperature sensor PT1000, it must be connected
accurately.
Check the operation of the temperature sensor PT1000:
• Check the operation of the temperature sensor PT1000 (resistance 1000 Ohm at 0°C -
see the resistance table for sensors PT1000); if a malfunction of the temperature sen-
sor is detected, it must be replaced.
Displaying the error ALARM RTC FAIL
Description of error
An error is detected on the PLC frequency oscillator, it affects the normal operation of
the meters.
Response of internal unit con-
troller
The device will not restart until the error is resolved.
Possible causes /
Troubleshooting
The reset of the error by pressing and holding ENTER does not help:
• Replace the PLC module.