Panasonic Inverter Air Conditioner R410A Technical Data And Service Manual

1-115
1. Specifications
7-22. Precautions
  Request that the customer be present at the time the test run is performed. Explain the Operating Instructions to
the customer, and then have the customer actually operate the system.
  Be sure to pass the manual and warranty certi cate to the customer.
  Verify that the AC 208 / 230 V wiring is not connected to the terminal plate which is used to connect the inter-unit
control wiring.
* If AC 208 / 230 V is accidentally applied to this terminal plate, the fuse...

1-116
1. Specifications
7-23. When Setting Indoor Unit Control PCB Switch for Wall Mounted Indoor Unit
When using both the wired and wireless remote controller, refer to the procedure below.
  If this setting is not made correctly an alarm will occur. (The operation lamp on the display blinks.)
  This setting is not necessary for the case of using wireless remote controller only.
  The slide switch setting at the time of factory shipment for model K1 type is “B.”
  When using wired remote controller as...

1-117
1. Specifications
7-24.  Diagnosis TableWired remote 
Cause
E 0 1
E 0 2
E 0 9
E 1 4
E 0 4
E 0 6
E 1 5
E 1 6
E 2 0
P 0 5
L 0 2
P 0 9
 dis
played
L 0 7
 displayed
Indoor unit 
1:1 connection (single type)
Nothing is
displayedNothing is
displayed
 displayed
 displayedOperating lamp
is blinking.
 displayed
 displayed
 displayed
 displayed
 displayed
 displayed
 displayed
 displayed
 displayed
displayed
L 1 3
Standby lamp
is blinking.Operation lamp and
Standby lamp are 
blinking alternately.
Both the...

1-118
1. Specifications
1-13.  HOW TO PROCESS TUBING 8. HOW TO INSTALL THE TIMER WIRED REMOTE CONTROLLER
The liquid tubing side is connected by a flare nut, and Refer to the Instraction Manual attaehed to the Timer Remote Controller.
the gas tubing side is connected by brazing.
1. Connecting the Refrigerant Tubing
Use of the Flaring Method
Many conventional split system air conditioners employ 
the flaring method to connect refrigerant tubes which run 
between indoor and outdoor units. In this method,...

1-119
1. Specifications
Caution Before Connecting Tubes Tightly
(1) Apply a sealing cap or water-proof tape to prevent dust or water from
entering the tubes before they are used.
(2) Be sure to apply refrigerant lubricant to the matching surfaces of the
 are and union before connecting them together. This is effective for
reducing gas leaks. (Fig. 1-113)
(3) For proper connection, align the union tube and  are tube straight with
each other, then screw on the  are nut lightly at  rst to obtain a smooth...

1-120
1. Specifications
 Do not use a spanner to tighten the valve stem caps.
Doing so may damage the valves.
 Depending on the installation conditions, applying
excessive torque may cause the nuts to crack.
Precautions for Packed Valve Operation
   If the packed valve is left for a long time with the valve
stem cap removed, refrigerant will leak from the valve.
Therefore, do not leave the valve stem cap removed.
 Use a torque wrench to securely tighten the valve stem
cap.
   Valve stem cap tightening...

1-121
1. Specifications
4. Taping  the Tubes
(1) At this time, the refrigerant tubes (and electrical
wiring if local codes permit) should be taped
together with armoring tape in 1 bundle. To
prevent condensation from over owing the drain
pan, keep the drain hose separate from the
refrigerant tubing.
(2) Wrap the armoring tape from the bottom of the
outdoor unit to the top of the tubing where it
enters the wall. As you wrap the tubing, overlap
half of each previous tape turn.
(3) Clamp the tubing bundle...

1-122
1. Specifications
1-14. LEAK TEST, EVACUATION AND
     ADDITIONAL REFRIGERANT CHARGE
 Perform an air-tightness test for this package A/C.
Check that there is no leakage from any of the 
connections. Air and moisture in the refrigerant system 
may have undesirable effects as indicated below.
 pressure in the system rises
 operating current rises
 cooling (or heating) ef ciency drops
 moisture in the refrigerant circuit may freeze and block 
capillary tubing
   water may lead to corrosion of parts in...

1-123
1. Specifications
(3) Pressurize the system up to 4.15 MPa
(42 kgf/cm2G) with dry nitrogen gas and close the
cylinder valve when the gauge reading reaches
4.15 MPa (42 kgf/cm
2G). Then, test for leaks with
liquid soap.
CAUTION
To avoid nitrogen entering the
refrigerant system in a liquid
state, the top of the cylinder
must be higher than the bottom
when you pressurize the
system. Usually, the cylinder is
used in a vertical standing
position.
Fig. 1-125
CAUTIONUse a cylinder speci cally
designed for...

1-124
1. Specifications
CAUTION
To avoid gas from leaking
when removing the charge
hose, make sure the stem
of the gas tube is turned all
the way out (“BACK SEAT”)
position. 3. Charging Additional Refrigerant
 Charging additional refrigerant (calculated from the
liquid tube length as shown in Section 1-12. Installation
Instructions, 1. Tubing Size, Table 1-2 Tubing Data for 
Models, Amount of additional refrigerant charge) using
the liquid tube service valve. (Fig. 1-126)  
 Use a balance to measure the...