Daikin GYEQ20AN, Руководство по обслуживанию

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SiAUY361411EA Troubleshooting the Outdoor Unit
Troubleshooting 126
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Pump down operation procedure
1. On the outdoor unit, close the liquid side stop valve.
2. With the onboard checker set to the RUN mode, select "2. Special operation" to start the
pump down operation. For information on how to perform the special operation, see page
114 [How to Use the Checker on PCB] and page 115 [RUN Mode] .
3. Keep the unit running as is. The unit stops automatically when the low-side pressure
remains at 0.12 MPa or lower for 10 seconds or falls to 0.05 MPa or lower.
4. Immediately close the outdoor unit's gas side stop valve (intake gas side stop valve and
discharge gas side stop valve).
5. Turn off the power to the outdoor unit.
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Depending on the recharge amount, the outdoor unit may not be able to pump down the
whole amount of the refrigerant.
1.5.2 Periodic Inspection
Enable or disable the periodic inspection reminder. In addition, at the end of periodic inspection
or maintenance, be sure to clear the elapsed time since the last maintenance.
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Display of periodic inspection reminder [L8]
The periodic inspection reminder function is enabled by default to prompt for the arrival of the
periodic inspection timing and force-stop the system in the following sequence. (Standard
setting)
1. When the elapsed time since the last maintenance exceeds 9,800 hours, the system shows
a reminder without stopping.
2. When the elapsed time since the last maintenance exceeds 10,000 hours, the system enters
the energy saving mode.
3. When the elapsed time since the last maintenance exceeds 10,300 hours, the system
continues operating in the energy saving mode.
[Energy saving mode]
In this mode, the engine speed is decreased to save the cooling/heating capacity to protect the
system.
[Clearing the elapsed time since the last maintenance ]
Perform while the STOP mode is set to "3. Configure items." For information on how to clear the
elapsed time since the last maintenance, see
page 114 [How to Use the Checker on PCB]
and page 121 [STOP Mode] .
1.5.3 Part Replacement
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Operation performed when refilling the cooling water or extracting the air
[To cool down the cooling water after stopping the system]
The cooling water is hot immediately after stopping the system. Use the following method to
cool it down.
• With the onboard checker set to the STOP mode, select "2. Actuator check" and select the
cool-down mode. Then, the cooling water pump and the outdoor fan start operating and the
radiator cools down the cooling water. However, the cool-down performance will drop if the
temperature reaches 70°C or lower because the cooling water does not circulate in the
radiator. For information on how to perform the special operation, see
page 113 [How to Use
the Checker on PCB] and page 114 [RUN Mode] .
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Clearing the GVM correction amount after replacing specific parts
[After replacing the air cleaner element]
If you have replaced the air cleaner element without clearing the elapsed time since the last
maintenance,
clear the GVM aging correction amount .