14 Piping installation
Installation and operation manual
28
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546220-1C – 2020.10
"
t23
" is flashing
• Push BS2 within 5 minutes
• Open valve A
("
t22
" startup control)
("
t23
" waiting for stable heating)
"
t03
" is flashing
• Push BS2 within 5 minutes
• Open valve A
("
t02
" startup control)
("
t03
" waiting for stable cooling)
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
• Push BS2
• T
A
check will be performed
• Close valve A
• Push BS1 to leave program
• Charging is finished
• Fill in the amount on the additional refrigerant charge label
• Input the additional refrigerant amount via setting [2-14]
• Go to test run
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.
• "
t0
X" will appear
• Push BS1
• Charging is finished
• Fill in the amount on the
additional refrigerant charge
label
• Input the additional refrigerant
amount via setting [2-14]
• Go to test run
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
• Input the additional refrigerant
amount via setting [2-14]
• Go to test run
During grey conditions
<< Continuation of previous page
Heating charging
Cooling charging
14.4.5
To charge refrigerant
Follow the steps as described below and take into account whether
you want to use the automatic charge function or not.
Pre-charging refrigerant
1
Calculate the additional amount of refrigerant to be added using
the formula mentioned in
25].
2
The first 10 kg of additional refrigerant can be pre-charged
without outdoor unit operation.
If
Then
The additional refrigerant amount
is smaller than 10 kg
Perform steps 3~4.
The additional refrigerant charge
is larger than 10 kg
Perform steps 3~6.
3
Pre-charging can be done without compressor operation, by
connecting the refrigerant bottle to the service ports of the liquid
and equalising stop valves (open valve B). Make sure that valve
A and all outdoor unit stop valves are closed.
NOTICE
During pre-charging, the refrigerant is charged through the
liquid line. Close valve A and disconnect the manifold from
the gas line. The equalising line is ONLY charged to break
the vacuum. Charge it to maximally 0.05 MPa (0.5 bar),
then close valve C and disconnect its connection to the
manifold. Continue pre-charging through the liquid line
only.
