Helmer Scientific i.Series
®
and Horizon Series
™
Freezer - Undercounter
Service and Maintenance Manual
360417/A
64
13 Troubleshooting
NOTICE
Review all safety instructions prior to troubleshooting.
13.1 Access System Problems
Problem
Possible Cause
Action
Door does not lock
Lock mechanism is
damaged.
Inspect lock/latch, Replace if necessary.
Door does not lock
(Magnetic Access Control Option)
Magnetic door lock is not
aligned with the strike plate.
Align lock/door to the match strike plate.
Magnetic lock is not
receiving power.
Trace voltage to the lock using the schematic, replace lock if needed.
13.2 Alarm Activation Problems
Problem
Possible Cause
Action
Battery alarms
(Er06)
The 9V battery is not
installed.
Install 9V battery.
The battery is low due to a
power failure.
Allow the battery to recharge.
Faulty battery or wiring
connection.
Check wiring and replace battery if needed.
Probe failure alarms
(Er01 - Control Probe; Er02 - Monitor Probe;
Er03 - Evaporator Defrost Probe)
Faulty probe or wiring
connection.
Check corresponding probe connection. Test resistance of probe
(86 Ω to 110 Ω) Replace probe if needed.
Power failure alarm
(PoFF)
Power was interrupted to
freezer.
Restore facility power.
Power switch is in the off “o”
position.
Turn power switch to the on “-” position.
Power cord is loose.
Check both ends of the power cord at the wall outlet and the freezer.
GFI/GFCI Outlet has
tripped.
Move to standard outlet. Helmer does not recommend operating this unit on
a GFI outlet.
Inverter Error
(Er05)
Power was lost to the freezer.
See Power Failure alarm.
Loose wiring connection.
Check wiring between control board and inverter.
Door alarm
Door is open.
Close door.
Faulty door switch or wiring
connections.
Check wiring and continuity of switch contacts. Replace switch if needed.
Alarm is active but there is no
audible alarm.
Key switch is in the OFF
position.
Turn key to ON position.
Horizon Series
