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Cooling charging
(
02
startup control)
(
03
waiting for stable cooling)
03
is flashing
• Push BS2 within 5 minutes.
• Open valve C.
Display show
03
and low pressure
value with an interval of 1 second.
Refrigerant will be charged automati-
cally.
PE
=charging nearly finished
P9
=charging finished
OR
P(lbs.(kg)) was added during auto-
charge
R=Q+P
• Close valve C.
• Push BS1 to leave program.
•
Charging is finished.
• Fill in the amount on the additional
refrigerant charge label.
• Go to test run (see 15.4. Test opera-
tion on page 43).
During gray
conditions
If following codes appear:
E-2
(indoor
temperature out of range) and
E-3
(outdoor temperature out of range).
In this case, perform automatic charg-
ing procedure again.
See figure Location of valves next page for more information refer to
the text in this chapter.
Be sure to charge the specified amount of refrigerant in liquid state.
Since this refrigerant is a mixed refrigerant, adding it in gas form
may cause the refrigerant composition to change, preventing normal
operation.
• Before charging, check whether the refrigerant cylinder is equipped
with a siphon tube or not.
Charge the liquid
refrigerant with the
cylinder in upright
position.
Charge the liquid
refrigerant with the
cylinder in upside-
down position.
• Be sure to use tools exclusively for R410A to ensure required pres-
sure resistance and to prevent foreign materials from mixing into
the system.
NOTE
Charging with an unsuitable substance may cause explosions and ac-
cidents, so always make sure that the appropriate refrigerant (R410A)
is charged. Refrigerant containers must be opened slowly.
CAUTION
• When charging a system, charging over the permissible quantity
can cause liquid hammer.
• Always use protective gloves and protect your eyes when charging
refrigerant.
• When the refrigerant charging procedure is done or when pausing,
close the valve of the refrigerant tank immediately. If the tank is left
with the valve open, the amount of refrigerant which is properly
charged may get off point. More refrigerant may be charged by any
remaining pressure after the unit has stopped.
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