- 174 -
Troubleshooting
8
Error reset (KEY 3)
Test operation (KEY4)
Is both service valves open?
Since the service valve is clogged, open
the service valve.
Since it is the electronic expansion valve
close error, check the electronic expansion
valve and PCB related.
Since it is the defect of compressor
unloading, check the coil end of PWM
valve. If there is no trouble in the coil,
replace the PWM valve.
Is the low pressure
rapidly dropping and the
discharge temperature
increasing?
Since the refrigerant is insufficient,
check to charge if needed.
Are all indoor units
operated normally?
Is high pressure and low
pressure normal?
Are all the above check
items normal?
Complete the test operation mode
and check for 1 unit operation
The system check is
completed.
Operating
pressure
(kg/cm
2
G)
OPEN
1.2±0.2
CLOSE
2.2±0.2
Low switch specification
8-2-4. Low pressure switch detection
Outdoor unit display
Indoor unit display
Judgment method
Causes
(Operation)
(Timer)
(Fan)
(Filter)
(Removing frost)
- Operation stop when low pressure is lower than 1.2kg/cm
2
G(sensor open)
-
System down if the two times of the same situation occurs after restarting
-
(Counter cleared if no defection for 1 hour)
- Low temperature start(outdoor temperature is lower than -5°C
- Leakage / Shortage of refrigerant
- Compressor unloading failure
- Service valve clogged/electronic expansion valve clogged
✳
The minimum applicable temperature of DVM is -5°C and the system may not operate normally below the temperature by the low pressure switch.
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
DB98-17816A(1)_8 3/2/04 9:34 AM Page 174
Summary of Contents for DVM Series
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Page 280: ... 279 Exploded Views and Parts List 31 1 56 1 31 5 31 4 31 3 31 2 56 2 57 ...
Page 281: ... 280 Exploded Views and Parts List 9 F Type cont 31 1 56 1 31 5 31 4 31 3 31 2 56 2 57 ...
Page 285: ... 284 Exploded Views and Parts List 9 ...
Page 287: ... 286 Exploded Views and Parts List 9 31 1 31 4 31 2 31 5 31 6 31 3 57 1 57 2 58 G Type cont ...
Page 291: ... 290 Exploded Views and Parts List 9 ...
Page 292: ... 291 Exploded Views and Parts List 31 1 31 6 31 5 31 4 31 2 31 3 62 1 62 2 63 1 63 2 ...
Page 298: ... 297 Exploded Views and Parts List 31 1 31 6 31 5 31 4 31 2 61 1 61 2 62 1 65 2 31 3 ...
Page 358: ... 357 Memo ...
Page 361: ... 360 Wiring Diagram 10 10 1 2 4 way cassette type Cooling only AVMCC ...
Page 362: ... 361 Heat pump AVMCH ...
Page 369: ... 368 Wiring Diagram 10 070F This Document can not be used without Samsung s authorization ...
Page 370: ... 369 Wiring Diagram 080 100 This Document can not be used without Samsung s authorization ...
Page 371: ... 370 Wiring Diagram 10 100F This Document can not be used without Samsung s authorization ...
Page 373: ... 372 Wiring Diagram 10 080 100 This Document can not be used without Samsung s authorization ...
Page 374: ... 373 Wiring Diagram 100F This Document can not be used without Samsung s authorization ...
Page 385: ... 384 Schematic Diagram 11 050 This Document can not be used without Samsung s authorization ...
Page 389: ... 388 Memo ...