Samsung MH18AP1(P2)-09, Service Manual

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Troubleshooting
Samsung Electronics 40
4. Check the test operation status by pressing the PCB switch S/W-A and S/W-B of outdoor unit.
• Check the operation status by pushing the switch one at time.
• Perform the test operation only for the unit selected last.
• Check the pipe pressure and the other operation status during the test operation.
• Check items when the error occurs during the test operation (each unit)
- Check there is enough refrigerant.
- Check pipe connections.
EXAMPLE
◆
In case of unit A test, push once the PCB switch S/W-A (same for unit B).
- In such a case, the indoor unit of unit A is operated automatically by the outdoor unit.
- In case the unit A test stops, push once more the switch S/W-A.
< Operation >
1. Once the test is started, the COMP is on and Good (displayed Gd) or Error (displayed Er) is displayed after 4 minutes .
: Taking difference between the present temperature of indoor heat exchanger and the temperature 4 minutes later, if the temperature
difference is over 5°C, the connection is good or if the temperature difference is below 5°C, the connection is bad.
2. If the result of the test operation is good operation, is possible for 30 minutes max.
If there is an error, the outdoor unit shall be stopped immediately.
If an error occurs, push switch S/W-A or S/W-B once to resume from the error status. Restart is then possible.
3. Once the test operation is completed, push switch S/W-A or S/W-B to finish the test.
4. Once the test is completed, operate the indoor unit normally.
5. Check the operation is normal. Start up is over.
C B
TEST OPERATING
C B
A
A
OUTDOOR UNIT
A : PCB display
B : Red LED
C : PCB switch
■
MH18–/MH19–/MH24–
■
MH26–
TEST OPERATING
C
B
A
S/W-A S/W-B S/W-C
OUTDOOR UNIT
A : PCB display
B : Red LED
C : PCB switch
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