1. Troubleshooting procedure (No operation, No heating, No cooling)
Connect U,V,W phase leads to the
power module again and operate the
air conditioner.
Gas leaks.
Repair and seal refrigerant.
Is the self-diagnosis lamp mode as
shown on the right?
YES
Error (Gas leaking)
Normal
Perform a final check of operation.
When the
self-diagnosis lamp
lights in the same
condition as above.
The compressor is defective. Replace it
and seal refrigerant.
If the compressor checker for an
inverter type air conditioner is
available, re-check using it.
( )
(JUDGING BETWEEN GAS LEAKAGE AND
COMPRESSOR DEFECTIVE)
Blinking
off
Time until the
lamp lights
Approx. 10 seconds
Approx.
10
seconds
Approx.
10
seconds
Within
Approx.
30
seconds
Compressor
Compressor
Gas
leakage
Possible
malfunctioning
part
LD301
Self-
diagnosis lamp
Lighting mode
Blinks
2 times
Blinks
3 times
Blinks
4 times
Blinks
5 times
Blinks
6 times
Blinks
8times
Stop to operate and check the gas
pressure in balancing mode.
Checking the IPM (main P.W.B.)
(R410 A)
The values above are the theoretical ones.
CHECKING THE REFRIGERATING CYCLE
MODEL RAC-E10H2
1. Tur
T
T n off the power switch.
2. Remove the electrical box cover.
3. Tur
T
T n on the power switch
4. After waiting for 30 seconds, push the service switch for a second.
LD303 (red) will light and the unit will operate in the forced cooling mode at this time.
Never operate the unit for
more than 5 minites.
(Cautions)
(1) If interface signal (DC 35V) terminals C and D are not connected when the outdoor unit is in forced cool mode,
the outdoor unit defect indicator (LD301) will blink 9 times during operation to indicate communication error.
(2) If checking is done with the compressor connector disconnected, the unit will stop and LD301 will blink 4 times.
Be sure to push the service switch for a second again to stop the forced cool operation.
1. Connect the large dia. pipe side and small dia. pipe side service valve using a pipe.
Parts to be prepared
(1) Reducing union
2/8” (6.35 mm)
3/8” (9.52 mm)
(2) Copper pipe (2/8” and 3/8”)
Connect the small diameter service
value and the large diameter service
valve using the reducing union and
copper pipe as shown on the right.
Charge refrigerant of 300g
The operation method is the same as “How to operate using the connector to servicing the outdoor unit”.
Do not operate for more than 5
minutes
Large dia. service valve
Reducing union
(2/8” and 3/8”)
Copper pipe
(2/8”)
Small diameter
service valve
Reversing
valve
Compressor
Outdoor unit
HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT
TO
TO
HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY
TO
TO
after vacuuming ( 1)
after vacuuming ( 1)
1 The charging amount of 200g is equivalent to the load in normal operation.
ＬＤ３０３
ＬＤ３０２
ＬＤ３０
１
Service switch
LD303
LD302
LD301
MAIN P.W.B.
SERVICE SWITCH
HIC
- 91 -
