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Error
Code
Problem Operation Reset
H4
Booster Tank Thermistor Error (open)
Thermistor senses abnormal temperature
(at or below -6°F (-21°C)).
Normal
(Booster tank
heaters off)
After replacing failed component,
alarm resets.
H5
ROM/RAM Error
Control board ROM/RAM fails.
Whole unit
stops
After replacing control board, alarm
resets.
H6
EEPROM Error
EEPROM fails.
Whole unit
stops
After replacing control board, alarm
resets.
L1
Conveyor Overload or Table Limit Error 1
Inverter sends conveyor overload signal or
table limit switch closes.
Unit stops After error signal stops, alarm resets.
L2
Conveyor Overload or Table Limit Error 2
After unit stops with "L1" error and restarts,
another error signal is sent within 3
seconds.
Whole unit
stops
Use "ON/OFF" button to turn the unit
off and then back on.
b1
Booster Tank Error
Booster tank error output contacts open.
Normal After booster tank error is resolved,
alarm resets.
b2
Booster Tank Water Level Safety Error
Booster tank water level safety fl oat switch
opens after booster tank water level fl oat
switch closes.
Whole unit
stops
Use "ON/OFF" button to turn the unit
off and then back on.
2. Error Code Log
Use the "ON/OFF" button to turn off the unit. Press and hold the "CHANGE" button, then
press the "ON/OFF" button. "01" should appear on the display. Use the down arrow button to
scroll to service menu items 21 through 25. 21 is the most recent error. Press the "CHANGE"
button to view the selected service menu item. Press the "CHANGE" button once again to
return to the main service menu list. If no errors exist in the log, "--" is displayed.
Press the "ON/OFF" button to exit the service menu. The display goes blank.
To erase the log, press and hold the up and down buttons for 3 seconds with one of the error
codes displayed. The unit beeps once and the entire log clears.