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m) Booster Tank Water Level Safety Error (b2)
• If the booster tank water level safety fl oat switch opens after the booster tank water level
fl oat switch closes, the unit shuts down, "b2" appears in the display, and the buzzer sounds.
• To reset, use the "ON/OFF" button to turn the unit off and then back on.
Booster tank water level safety float switch
opens after booster tank water level float switch
closes.
b 2
Code Error
Item Possible Cause Remedy
Unit stops
Operation
Flow rate too low. Readjust.
Water supply pressure
too low.
Readjust.
Water Heater
Strainer
Filter clogged. Clean.
Filter clogged. Clean.
Defective. Replace.
Water Valve
Open circuit. Repair or replace.
Control Board
Defective. Replace.
Connector not properly
connected.
Reconnect.
Booster Tank Water
Level Safety Float
Switch
Open circuit or
connector not properly
connected.
Repair or replace.
Sticking.
Check and clean. See
“III.D. Float Switch
Check and Cleaning.”
Defective. Replace.
Rinse Spray Arm
Disconnected or water
leaks from joint.
Reconnect.
Defective. Replace.
Clogged. Clean.
Rinse Water Level
Insufficient water
supply.
Readjust.
Pressure Reducing
Valve