Daikin UATYP-AY1B - Инструкция по эксплуатации - Страница 18

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The rooftop package units are factory pre-charged with suf

fi

  cient refrigerant. However, there may be a need for charge recovery 

during service and maintenance works. Therefore, some precautions must be taken to ensure optimum and trouble-free system 
operation:
(i)  The system should be throughly vacuumed to ensure no incompressible gas and moisture in the system. 
(ii)  Use a vacuum pump for R22 or R407C exclusively. Using the same vacuum pump for different refrigerants may damage 

the vacuum pump or the unit.

(iii)  The refrigerant should never be released directly into the environment.
(iv)  When charging R407C, ensure that only liquid is being withdrawn from the cylinder or can.

Normally, the R407C cylinder or can is being equipped with a dip-pipe for liquid withdrawal. However, if the dip-pipe is 
not available, invert the cylinder or can so as to withdraw liquid from the valve at the bottom.

TROUBLESHOOTING

If any malfunction of the air conditioner unit is noted for some simple trouble-shooting tips. Check the following 
fault conditions and causes for some simple troubleshooting tips. For any enquiries on spare part, please contact you 
authorized dealer.

Problem

Causes

Action

Unit does not run.

Power failure.

Press the [ON/OFF] after power restore.

Fuse blown or circuit breaker tripped.

Replace fuse or reset circuit breaker.

Power supply wiring phase incorrect.

Modify the wiring phase.

Compressor does not operate in 3 min 
after unit has started.

Protection against frequent starting.

Wait for 3 min for the compressor to start.

Air 

fl

 ow is low.

Filter is 

fi

 lled with dust and dirt.

Clean the 

fi

 lter.

There are some obstacles at the air inlet or 
outlet of the units.

Remove obstacles.

Compressor operate continuously.

Dirty air 

fi

 lter.

Clean the air 

fi

 lter.

Temperature setting is too low (for cooling).
Temperature setting is too high (for heating).

Reset the temperature.

No cool air delivered during cooling 
cycle, or no hot air delivered during 
heating cycle.

Temperature setting is too high (for cooling).
Temperature setting is too low (for heating).

Set the temperature lower.
Set the temperature higher.

On heating cycle, indoor fan stop 
suddenly.
UAT(Y)(P)60, 80, 100, 120A
On heating cycle, delivered air does not 
warm enough suddenly.
UAT(Y)(P)150, 200, 250, 300, 360, 420A

Unit is in defrosting cycle.

Wait for a while.
(It will be resumed after defrosting.)

If the fault persists, please call your authorized local dealer/serviceman. 

VACUUMING AND  CHARGING

Invert cylinder 
without dip-pipe

Liquid 
withdrawal

Dip-pipe

!

 CAUTION

Do not top-up when servicing leak, as this will reduce the unit performance. Vacuum the unit thoroughly and then 

charge the unit with fresh R22 & R407C according to the amount recommended in the speci

fi

 cation.

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6/26/14   3:18:18 PM

6/26/14   3:18:18 PM