Daikin RZQ71~125B7V3B, Руководство по обслуживанию, Страница: 305 / 484

ESIE04-01 Additional Checks for Troubleshooting
Part 3 – Troubleshooting 3–105
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4
5
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5.9 Evaluation of abnormal high pressure
Abnormally high pressure level is mostly caused by the condenser side. The following contents are
provided by service engineer based on their field checks. Further, the number is listed in the order of
degree of influence.
In cooling operation
In heating operation
Check items (Possible causes) Judgment
Does the outdoor unit fan run normally? Visual inspection
Is the outdoor unit heat exchanger clogged? Visual inspection
Is there clogging before or after the EV (capil-
lary)? Check if there is a temperature difference
before and after EV (capillary).
Check if the main valve unit of EV operates
(by noise, vibration).
Is the check valve clogged?
*Heat pump model only Check if there is a temperature difference
before and after check valve.
→
If YES, the check valve is caught.
Is the HPS normal? Check continuity by using a tester.
Is the outdoor unit installed under such condi-
tions that short circuit easily occurs? Visual inspection
Is the piping length 5 meters or less? Visual inspection
Does air enter the refrigerant system? Conduct refrigerant collection and vacuum dry-
ing, and then add proper amount refrigerant.
Is the refrigerant overcharged? Conduct refrigerant collection and vacuum dry-
ing, and then add proper amount refrigerant.
Check items (Possible causes) Judgment
Does the indoor unit fan run normally? Visual inspection
Is the indoor unit heat exchanger clogged? Visual inspection
Is the indoor unit installed under such conditions
that short circuit easily occurs? Visual inspection
Is there clogging before or after the EV (capil-
lary)? Check if there is a temperature difference
before and after EV (capillary).
Check if the main valve unit of EV operates
(by noise, vibration).
Is the check valve clogged? Check if there is a temperature difference
before and after check valve.
→
If YES, the check valve is caught.
Is the HPS normal? Check continuity using a tester.
Is the piping length 5 meters or less? Visual inspection
Does air enter the refrigerant system? Conduct refrigerant collection and vacuum dry-
ing, and then add proper amount refrigerant.
Is the refrigerant overcharged? Conduct refrigerant collection and vacuum dry-
ing, and then add proper amount refrigerant.
RZQ - Final.book Page 105 Wednesday, September 8, 2004 8:40 AM