Troubleshooting; [A] Troubles Requiring Immediate Service Call; [B] Troubles Requiring Check By User - Hoshizaki JWE-620UA-6B Instruction Manual

20. TROUBLESHOOTING

If something seems wrong with the unit, check for possible causes according
to the following instructions. If the problem still exists, immediately contact an
authorized Hoshizaki service company.
When contacting a service company, let them know the model name, serial
number, date of installation (see warranty card) and type of trouble (ex. error
code).

[a] TROUBLES REQUIRING IMMEDIATE SERVICE CALL

When one of the following error codes fl ashes in the display, move the power switch (GFCI)
to the "OFF" position, and immediately contact an authorized Hoshizaki service company.
Error Code
o1, o2 Booster tank water level switch
H1 - H4 Thermistors
H7 Reverse phase connection

[b] TROUBLES REQUIRING CHECK BY USER

When one of the following error codes fl ashes in the display, check for possible causes.
After the problem has been resolved, press the "ON/OFF" button on the operation panel to
resume operation. The error code disappears, and the buzzer stops.
If the error code appears again, move the power switch (GFCI) to the "OFF" position, and
immediately contact an authorized Hoshizaki service company.
Error Code
A1 Auto fi ll
A2 Water supply from water heater
Low wash water level in operation
A3
or standby mode
IMPORTANT
Problem
Problem
21
Possible Cause
Drain pipe disconnected
Dirty water level sensor
Water failure
Water supply valve closed
Water supply line shut-off valve closed
Drain pipe disconnected
Tank fi lter out of position