MSEX0025_rev01
10
Fault:
Bimetal does not open for 3 consecutive defrost cycles
Solution:
Technician must visit client and proceed according to the instructions in item 3.2.7.2 – 4Hz Alarm
Code 6– On / On / Off
Fault:
Bimetal opens when not defrosting
Solution:
Technician must visit client and proceed according to the instructions in item 3.2.7.2 – 4Hz Alarm
Code 7– Off / On / Off
Fault:
Bimetal opens too quickly for 3 consecutive defrost cycles
Solution:
Technician must visit client and proceed according to the instructions in item 3.2.7.2 – 4Hz Alarm
When one of these faults occur, the client must be instructed to turn off the sound alarm by
pressing the Alarm Off key, however, THE PRODUCT MUST NOT BE UNPLUGGED FROM THE WALL
SOCKET.
As previously mentioned, these faults are related to the 2 or 4Hz Alarms, and are explained in greater detail
as follows:
3.2.7.1 - 2Hz Alarm
This type of alarm is identified through interface Board LEDs that blink 20 times each 10 seconds, together
with sound Beeps, being associated with:
•
Door Opened for more than one and half minute: (See Item 3.2.4 Door Management)
•
Lack of Magnet inside the Door: these models have an injected Magnet (foamed) together with the
Doors (next to the Upper and Lower Heads) as shown in item 3.1, Lights Actuation System; so, if the
magnet is missing, the product would assume that the door is open and it would actuate the 2 Hz alarm
system; therefore, aided by another magnet, check if the magnet exists by passing it over the plastic
Heads. If magnetic attraction exists, discard this possibility.
•
Temperature Sensor Failure, which is reading temperatures above zero at the Freezer, while the
product is normally working (cooling) at a temperature below zero. This type of failure is most likely to
happen during night/dawn hours when the Doors opening is less frequent.
Sensor Analysis Procedure
Medium
Min.
Freezing Level
On
Door
Open
Alarm Off
Máx
.
Medium
Min.
Freezing Level
On
Door
Open
Alarm Off
Máx
.
