Carrier 38VT 188CTST Series - Page 39

EN
EN
EN
ID
– 38 –
Terminal unitCenter unitVacuum
pump
Refrigerant
Cylinder
High pressure side
pressure port
High pressure side
pressure port
Low pressure side
pressure port
Low pressure side
pressure port
Liquid pressure side
pressure port
Liquid pressure side
pressure port
081*~141*
14A*~261*
Pressure port dedicated
to refrigerant auto charge
(Pipe cover color: Brown)
Pressure port dedicated
to refrigerant auto charge
(Pipe cover color: Brown)
Liquid side
service vale
Gas side
service vale
Liquid side
service vale
Gas side
service vale
Automatic charge set up procedure
Please warm cylinder when 7-segment [B] starts flashing if need (No.5).
No. Confirmation procedure
Rotary switch 7-segment
SW01 SW02 SW03 display[A] display[B]
1
Fully open the valves of the outdoor unit at liquid and gas sides. 1 1 1 [U . 1] [… …]
2
Outdoor center unit I/F rotary switch initial setting is described on
the right.
2 10 1 [C. S] [… …]
3
Turn the rotary switch SW01 and SW02 clockwisely to set as
described on the right.
[0 0 0]
↓
[passed time]
4
Press SW04 more than 10 seconds system starts cooling, then
described on the right displayed on 7-segment [B] as [0 0 0]. After
system starts running, 7-segment [B] displays elapsed time per
minute.
5
Automatic refrigerant charging starts after about 5 minutes passed
from system running and 7-segment [A] starts flashing.
6
Remote controller displays “test” and no command will be permitted.
7
When refrigerant cylinder become empty during refrigerant charge,
keep the system running and change the refrigerant cylinder to
new one.
No. Confirmation procedure
Rotary switch 7-segment
SW01 SW02 SW03 display[A] display[B]
8
When automatic refrigerant is finished, then 7-segment [B] indicate
[End] and [passed time].
[C . E] [E n d]
↓
[passed time]
9
Turn back the rotary switch to initial setting. 1 1 1 [U . 1] [… …]
!
Close the cylinder valve and remove the charge hose from
refrigerant charge port.
Shut the refrigerant charge port and service panel on the right side.
Refrigerant charging start from about 5 minutes later after system have been moved. If the refrigerant charged
before 5 minutes passed, stop system and check the list below.
• Check connection and installation of charging hose. Make sure that charging hose is properly connected to the
charging port.
Check code of automatic refrigerant charging
Automatic refrigerant check code
Supplementary information
1 How to stop automatic
refrigerant charge.
Press outdoor center unit I/F
rotary SW05 switch more than
10 seconds
2 When the system stop
automatically.
System may stop because of
protective action, but system
will restart 150 seconds later.
3 When the 7-segment [B]
display the check code on
the left.
Look at the check items and
see something is wrong with
the system.
When you restart automatic
charge, look at automatic
charge setting up procedure
again.
Check
code
Check code
name
Cause of system
disengage
Check items (locations)
[in. E] Indoor unit
error
Indoor unit stop
• Check code detection of indoor unit
[t c 1] Indoor heat
exchanger
frost
• Check connection of indoor unit PMV
sensors connector and wiring.
• Check indoor temperature
[b u p] Compressor
back up
Set to back up mode
• Automatic refrigerant charge is prohibited in
back up mode
[E r r] Prohibited
condition
Prohibited condition
• Prohibited to do automatic refrigerant
charge when fresh air intake indoor unit type
is installed
[o i L] Low oil level
protection
Operating compressor
detects continuous state
of low oil level
• Check connection and installation of TK1
and TK2 sensors.
• Check resistance characteristics of TK1 and
TK2 sensors.
• Check for gas or oil leak in same line.
• Check for refrigerant problem inside
compressor casing.
• Check SV3D, SV3F valves for failure.
• Check oil return circuit of oil separator for
clogging.
• Check oil equalizing circuit for clogging.
[S t P]
[1 2 0]
Automatic
refrigerant
charge
overtime
• Automatic refrigerant
charge time over 120
minutes (24 HP or under)
• Check the refrigerant cylinder valve is open.
• Check the refrigerant cylinder is empty.
• Check connection of PMV4 sensors
connector and wiring.
[S t P]
[1 8 0]
• Automatic refrigerant
charge time over 180
minutes (26 HP or above)
[□ □ □]
other than
above
codes
Outdoor unit
error
Outdoor unit stop • Check the outdoor unit check codes.
※ • Amount of charging refrigerant is large, it may take longer than 120 or 180 minutes. If any problem cannot be
confirmed, then please start the automatic charge again.
• The charging time will continue counting even the cylinder unable to charge the refrigerant due to less gas
pressure (the amount of refrigerant inside cylinder is empty or little).
If the cylinder weight did not change latest 10 minutes, please change to new cylinder.