RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
Installation and operation manual
33
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.
Be sure to use tools exclusively for R410A to ensure required
pressure resistance and to prevent foreign materials from mixing
into the system.
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<< Continuation of previous page
Heating charging
("
t22
" startup control)
("
t23
" waiting for stable heating)
Cooling charging
("
t02
" startup control)
("
t03
" waiting for stable cooling)
"
t23
" is flashing
• Push BS2 within 5 minutes
• Open valve A
"
t03
" is flashing
• Push BS2 within 5 minutes
• Open valve A
Display show "
t23
" and low
pressure value with an interval of
1 second.
• Add additional refrigerant
amount P (kg)
• Close valve A
• Push BS3 to stop operation
• Ending code "
t26
" will appear
Display show "
t03
" and low
pressure value with an interval of
1 second.
Refrigerant will be charged
automatically.
"
PE
"=charging nearly finished
"
P9
"=charging finished
OR
P (kg) was added during
autocharge
R=Q+P
• Close valve A
• 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
operation" on page 43
)
• Push BS2
• T
A
check will be performed
• "
t0X
" will appear
• Push BS1
• Charging is finished
• Fill in the amount on the
additional refrigerant charge
label
• Go to test run (see
"15.4. Test
operation" on page 43
)
Following codes appear: "
E-2
"
(indoor temperature out of range)
and "
E-3
" (outdoor temperature
out of range)
• 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
operation" on page 43
)
During grey
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
charging procedure again.
See figure
"Location of valves" on page 34
; for more information refer to the text in this chapter.
Charge the liquid
refrigerant with the
cylinder in upright
position.
Charge the liquid
refrigerant with the
cylinder in upside-down
position.
NOTICE
Charging with an unsuitable substance may cause
explosions and accidents, so always make sure that the
appropriate refrigerant (R410A) is charged. Refrigerant
containers must be opened slowly.
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