Helmer (Version A) HB120(Versions A and B), Service Manual

Page: 52 / 138

360077-1/O 51
i.Series® - All Models
11.4 Testing Problems
Problem Possible Cause Action
The automatic
temperature tests do
not work.
Upper chamber
temperature probe
connection is loose.
► Test the probe connection. Secure the connection
if necessary.
Upper chamber
temperature probe is
faulty.
► Test the probe. Replace the probe if necessary.
Control board is faulty. ► Replace parts with those that are included in the
control and display board kit.
High Alarm setpoint
is set significantly
higher than the default
value, or the Low
Alarm setpoint is set
significantly lower
than the default value.
► Confirm the alarm setpoints are set at the
appropriate values.
► Test the temperature alarms manually.
11.5 Condensation Problems
Problem Possible Cause Action
Excessive water in
the water evaporation
tray.
Heater in the
evaporation tray is
faulty.
► Confirm the heater is hot and is drawing the
appropriate current.
► For 115 V refrigerators, the current should be
approximately 0.43 A to 0.55 A.
► For 230 V refrigerators, the current should be
approximately 0.21 A to 0.35 A.
Humid air is entering
the chamber.
► Confirm the refrigerator is level, and the doors are
aligned, closing tightly, and sealing correctly.
► Contact Helmer Technical Service to correct issues
as necessary.
Excessive water in the
chamber.
Humid air is entering
the chamber.
► Confirm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
Connection between
the unit cooler and the
drain tube is loose.
►
Confirm the connection is secure. Tighten the
connection if necessary.
Defrost timer is faulty.
►
Replace the defrost timer.
Drain line is plugged. ► Confirm the drain tube is free of debris. Remove
debris if necessary.
Excessive humidity on
the doors.
Humid air is entering
the chamber.
► Confirm the refrigerator is level, and the doors
are aligned, closing tightly, and sealing correctly.
Correct issues as necessary.
Relative humidity
around the refrigerator
is too high.
► Confirm the refrigerator is placed properly. Refer
to the operation manual.