Daikin GYEQ20AN Service Manual page 137

SiAUY361411EA
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
3. Keep the unit running as is. The unit stops automatically when the low-side pressure
4. Immediately close the outdoor unit's gas side stop valve (intake gas side stop valve and
5. Turn off the power to the outdoor unit.
∗ Depending on the recharge amount, the outdoor unit may not be able to pump down the
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.
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
2. When the elapsed time since the last maintenance exceeds 10,000 hours, the system enters
3. When the elapsed time since the last maintenance exceeds 10,300 hours, the system
[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
[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
[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.
Troubleshooting
Pump down operation procedure
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].
remains at 0.12 MPa or lower for 10 seconds or falls to 0.05 MPa or lower.
discharge gas side stop valve).
whole amount of the refrigerant.
Display of periodic inspection reminder [L8]
a reminder without stopping.
the energy saving mode.
continues operating in the energy saving mode.
Operation performed when refilling the cooling water or extracting the air
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].
Clearing the GVM correction amount after replacing specific parts
Troubleshooting the Outdoor Unit
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