Section 4 – Troubleshooting
Note:
When 2 or more alarm conditions occur simultaneously,
the lowest number code has priority on the display.
After a power failure, the unit will resume operation with
the set values that were in place before the power failure
occurred.
Model 3680 Series _______________________________________________________________________Troubleshooting
4 - 1
Type
Symptom
Indication
Alarm Buzzer
Safety Response
High
Temp
Alarm
Chamber temp
deviates from 2°C to
14°C above setpoint
Intermittent after
15 minute delay
Remote alarm is activated
after 15 minute delay
Chamber temp
deviates from 2°C to
14°C below setpoint
Alarm light
flashes
Temp display
flashes
Intermittent
Remote alarm is activated
after 15 minute delay
Low Temp
Alarm
If chamber temp is
lower than 0°C
---
---
Remote alarm is activated
Power
Failure
Alarm
Power failure or
accidental power
disconnect
---
---
Remote alarm is activated
Door
Alarm
Door is open
DOOR light on
Intermittent after
2 minute delay
---
Auto
Return
No keys pressed for
90 seconds in set
mode
Chamber temp
displayed
---
Set mode is cancelled
Key lock
Key lock is on or set
to “1”
---
---
Key input is disabled
Temp sensor short
circuits
Alarm flashes
E1 and
chamber temp
flash
alternately on
display
Intermittent
Remote alarm is activated
Defrost sensor operates
Defrost sensor short
circuits
Alarm flashes
E2 and
chamber temp
flash
alternately on
display
Intermittent tone
Remote alarm is activated
Continuous running
Temp
Sensor
Problem
Defrost sensor 2
short circuits
Alarm flashes
E3 and
chamber temp
flash
alternately on
display
Intermittent
Remote alarm is activated
Continuous running
