Hoshizaki TempGuard FH1-SSB, Service Manual, Page: 25 / 63

5
E. Alarm Signals and Countermeasures
If an error occurs, the alarm code and cabinet temperature are displayed in -second
intervals and an alarm sounds. See the table below for a description of the problem.
Alarm Signals
Alarm Code
Alarm
Sound Problem Reset Options
E1
3 beeps
every ten
seconds
High Temperature Alarm
[Freezers with Board Revision Level 10 or
Below and All Refrigerators]
Cabinet temperature has exceeded set
temperature by 10°F (5.6°C) for more than
hours.
[Freezers with Board Revision Level 11
and Above]
Cabinet temperature has exceeded set
temperature by 5°F (13.9°C) for more than
4 hours.
(When the unit is turned on, the first display
reads "r_##", where "##" indicates the board
revision level.)
Press "RESET." If temperature has returned
to setpoint range, alarm will stop and "E1" will
clear.
If temperature is not back in range, "RESET"
will silence the alarm for 5 minutes. "E1" will
continue to flash.
E
4 beeps
every ten
seconds
Low Temperature Alarm
Cabinet temperature has remained below
setpoint by 8°F (4.4°C) for more than 1 hour.
Press "RESET." If temperature has returned
to setpoint range, alarm will stop and "E" will
clear.
If temperature is not back in range, "RESET"
will silence the alarm for 5 minutes. "E" will
continue to flash.
E3
[Freezer Only]
(may alternate
with "dEF"
instead of
temperature)
5 beeps
every ten
seconds
Defrost Alarm
Defrost has taken longer than 1 hour. Control
board has terminated defrost.
Press "RESET." Alarm will stop and "E3" will
clear.
If 4 consecutive defrosts take more than 1
hour, a qualified service technician must be
called.
For the service tech to reset this alarm, press
"ALARM RESET" on the control board itself.
E4
6 beeps
every ten
seconds
High Pressure Alarm
Compressor discharge pressure is outside
normal operating range. Pressure switch has
been triggered 3 or more times in 1 hour.
If switch trips 5 times in 1 hour, compressor
will be stopped and will not restart.
Press "RESET." If pressure switch resets
automatically, alarm will stop and "E4" will
clear when pressure switch closes. After 5
pressure trips, the alarm can be silenced for 1
hour by pressing the "RESET".
For the service tech to reset this alarm, press
"ALARM RESET" on the control board itself.
E6
8 beeps
every ten
seconds
High Voltage Alarm
Line voltage has been too high for at least
10 seconds. To protect the compressor , the
compressor has shut down.
Alarm automatically resets when acceptable
voltage is detected.
Press "RESET" to silence alarm for 5 minutes.
E7
9 beeps
every ten
seconds
Low Voltage Alarm
Line voltage has been too low for at least
10 seconds. To protect the compressor , the
compressor has shut down. Alarm automatically resets when acceptable
voltage is detected.
Press "RESET" to silence alarm for 5 minutes.