Daikin SkyAir RZF-A Series, Руководство по обслуживанию

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Check SiME281906E
195 Part 6 Service Diagnosis
6.2 High Pressure Check
CHECK 2
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.
Cooling
6.3 Low Pressure Check
CHECK 3 Abnormally low pressure level is mostly caused by the evaporator side. The following contents
are provided based on field checking of service engineer. Further, the number is listed in the
order of degree of influence.
Cooling
No. Check items (Possible causes) Judgment
1 Does the outdoor fan run normally? Visual inspection
2 Is the outdoor heat exchanger clogged? Visual inspection
3
Is there clogging before or after the electronic
expansion valve (capillary)?
Check if there is a temperature difference before
and after electronic expansion valve (capillary).
Check if the main valve unit of electronic
expansion valve operates (by noise, vibration).
4 Is the high pressure switch normal? Check continuity by using a multimeter.
5
Is the outdoor unit installed under such
conditions that short circuit easily occurs?
Visual inspection
6
Does air enter the refrigerant system? Conduct refrigerant collection and vacuum drying,
and then recharge proper amount refrigerant.
7
Is the refrigerant overcharged? Conduct refrigerant collection and vacuum drying,
and then recharge proper amount refrigerant.
No. Check items (Possible causes) Judgment
1 Does the indoor fan run normally? Visual inspection
2 Is the indoor unit filter clogged? Visual inspection
3
Is there clogging before or after the electronic
expansion valve (capillary)?
Check if there is a temperature difference before
and after electronic expansion valve (capillary).
Check if the main valve unit of electronic
expansion valve operates (by noise, vibration).
4
Is the indoor unit installed under such
conditions that short circuit easily occurs?
Visual inspection
5
Is the refrigerant shortage? Conduct refrigerant collection and vacuum drying,
and then recharge proper amount refrigerant.