mabe PSS21 Series, Service Manual

Page: 34 / 65

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Communication Tests (0 2, 0 3 or 0 4)
A communication test will display the test code while checking the communication. When the test is finished,
the freezer display will show a P (pass) or an F (fault) for 2 seconds. After 2 seconds, the screens will show
the test code. At this time, you can enter a new test code.
Self-Test Temperature Control Panel (0 6)
This test applies only to the temperature control board inside the cooler compartment. When the Temperature
Control Panel Self-Test starts, all the LEDs and numerical segments on the screen will light up. When the
SAFE THAW button is pushed, all 3 LEDs for safe defrosting should be turned off. When the QUICK CHILL
button is pressed, all 3 LEDs for quick cooling should be turned off. Continue this procedure for each pair of
LED / button on the screen. The coldest key is to turn off seven-segment LEDs.
The warmer key is to turn off the Adjustment LED for both the freezer and cooler compartments.
To exit the Temperature Control Panel Auto-Test, both refrigerator temperature and adjustment keys must
be pressed simultaneously for 3 seconds. This can be done at any time to exit the test.
Table 2. Diagnostic Tests
Freezer
screen
Fridge
screen
Mo
de
Comment
0
2
Communication of the control
panel of temperature to the main
control panel P on the CG screen if it is OK
F on the CG screen if it is not OK
0
3
Communication of the
temperature control panel to the
board disp. P on the CG screen if it is OK
F on the CG screen if it is not OK
0 4
Communication of the board
disp. main control board P on the CG screen if it is OK
F on the CG screen if it is not OK
0
6
Self-test temperature control
panel
See Self-Test Temperature Control Panel on page 32.
0 7
Self-test of the control system
and sensor
See Self-Test Control and Sensor on page 33.
1 0
Open shock absorber
Shock absorber will open, brief pause and then close.
1 1
Speed fan test
Each fan works for 10 secs. then for
1 2
100% running time
This mode operates the sealed system 100% of the time
for 1 hour.
1
3
Between pre-cooling
This places the freezer in the pre-cooling mode.
1
4
Defrost entity
This will put the refrigerator in the defrost mode. If the
cabinet is not cold when it is run, this mode can do it
extremely quickly. The cooler will return to normal
operation by itself.
1
5
Reset fridge
It causes a readjustment of the system.
1
6
Out of Test Mode
It causes the system to exit the test mode and readjust
the temperature control panel.
1
7
C/F Degrees
Refrigerator temperature adjustment keys can be used to
change the display from F to C or C to F.