b) Internal Booster Tank Auto Fill Error (A2)
•In the auto fill cycle, if the internal booster tank water level float switch does not close within 10 minutes after the cycle starts, the unit shuts down, "A2" appears in the display, and the buzzer sounds.
•To reset, use the "ON/OFF" button to turn the unit off and then back on.
•See the chart below for possible causes and remedies.
Code
A 2
Error
Internal booster tank water level float switch does not close within 10 minutes after the auto fill cycle starts.
Operation
Unit stops.
Item
Booster
Strainer
Water Valve
Internal Booster Tank
Water Level Float
Switch
Possible Cause
Not ready for operation.
Water supply pressure too low.
Filter clogged.
Open circuit.
Filter clogged.
Defective.
Connector not properly connected.
Remedy
Get it ready.
Readjust.
Clean.
Repair or replace.
Clean.
Replace.
Reconnect.
Open circuit.
Sticking.
Repair or replace.
Check and clean. See “III.D. Float Switch Check and Cleaning.”
Control Board
Connector not properly connected.
Reconnect.
Defective.
Replace.
31
