Daikin RZP100DVAL [197/255] Check no 5

Daikin FAYP71BV1 [197/255] Check no 5
Troubleshooting by Remote Controller Display / LED Display SiE25-110
188 Troubleshooting
Check No. 5 If the high pressure is abnormally high
Conception
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.
a In cooling operation
Check items (Possible causes) Judgment
1. Does the outdoor unit fan run normally? 1. Visual inspection
2. Is the outdoor unit heat exchanger
clogged?
2. Visual inspection
3. Is there clogging before or after the EV
(capillary)?
3. Check if there is a temperature
difference before and after EV
(capillary).
Check if the main valve unit of EV
operates (by noise, vibration).
4. Is the check valve clogged?
*RZP71-140D models only
4. Check if there is a temperature
difference before and after check valve.
If YES, the check valve is caught.
5. Is the HPS normal? 5. Check continuity by using a tester.
6. Is the outdoor unit installed under such
conditions that short circuit easily
occurs?
6. Visual inspection
7. Is the piping length 5 meters or less? 7. Visual inspection
8. Does air enter the refrigerant system? 8. Conduct refrigerant collection and
vacuum drying, and then add proper
amount refrigerant.
9. Is the refrigerant overcharged? 9. Conduct refrigerant collection and
vacuum drying, and then add proper
amount refrigerant.
a. In heating operation
Check items (Possible causes) Judgment
1. Does the indoor unit fan run normally? 1. Visual inspection
2. Is the indoor unit heat exchanger
clogged?
2. Visual inspection
3. Is the indoor unit installed under such
conditions that short circuit easily
occurs?
3. Visual inspection
4. Is there clogging before or after the EV
(capillary)?
4. Check if there is a temperature
difference before and after EV
(capillary).
Check if the main valve unit of EV
operates (by noise, vibration).
5. Is the check valve clogged?
RZP71~140D models only
5. Check if there is a temperature
difference before and after check valve.
If YES, the check valve is caught.
6. Is the HPS normal? 6. Check continuity using a tester.
7. Is the piping length 5 meters or less? 7. Visual inspection
8. Does air enter the refrigerant system? 8. Conduct refrigerant collection and
vacuum drying, and then add proper
amount refrigerant.
9. Is the refrigerant overcharged? 9. Conduct refrigerant collection and
vacuum drying, and then add proper
amount refrigerant.

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