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[Remote controller cooling mode malfunction code]
[Remote controller heating mode malfunction code]
9-3 Procedure of check operation
•
Check operation perform the following work. Do the check opera-
tion following below.
Otherwise, malfunction code “U3” will be displayed in the remote
controller and nomal operation can not be carried out.
Check of shutoff valve opening
Check of miswiring
Judgment of piping length
Check of refrigerant overcharge (*)
* Over charging is judged only when the automatic charging oper-
ation in cooling mode is not performed.
Note
•
Check operation can not carried out at outdoor temp. less than –5°C.
Perform the check operation at day or time that outdoor temp. is –5°C
or more.
•
For interrupting the check operation, push RETURN button (BS3).
[Check Operation Procedure]
(1) Close the EL. COMPO. BOX lid and all front panels except as the
side of the EL. COMPO. BOX and turn on the power to the out-
door unit, function unit and all connected indoor units. (Be sure to
turn the power on at least 6 hours before operation in order to
have power running to the crank case heater.)
(2) Make the onsite settings as needed using the push button (BS1-
BS5) on the outdoor unit PC-board (A1P) with the power on. (See
“
10. ONSITE SETTINGS
”)
(3) Perform the check operation following the Check Operation
Method of the [Service Precautions] label (lower) on the EL.
COMPO. BOX lid (see figure 32). The system operation for about
45~60 minutes and automatically stops the check operation.
If the malfunction code is not displayed in the remote controller
after the system stop, check operation is completed. Normal oper-
ation will be possible after 5 minutes. If the malfunction code is
displayed in the remote controller, correct the malfunction follow-
ing [Remote controller displays malfunction code] and perform the
check operation again.
[Remote controller displays malfunction code]
Note
If any malfunction codes other than the above are displayed, check
the service manual for how to respond.
10. ONSITE SETTINGS
Use the push button switches (BS1 through BS5) on the outdoor unit
PC-board (A1P) to make the necessary onsite settings.
See the “Service Precautions” label (upper) on the EL. CONPO. BOX
lid for details on the positions and operating method of the push but-
ton switches and on the onsite setting. (see figure 32)
Make sure to record the setting on the accessory “REQUEST FOR
THE INDICATION” label.
Warning
Electric Shock Warning
Use an insulated rod to operate the push buttons via the inspection
door of EL. COMPO. BOX lid.
There is a risk of electric shock if you touch any live parts, since
this operation must be performed with the power on.
Code
The work contents
PE
Charging is almost finished. Ready to close the valve A.
PA
PH
The refrigerant tank is empty. Close the valve A and
replace empty tank to the new tank. After changing the
tank, open the valve A again.
Beware the fan running. The outdoor unit does
not stop operation.
P8
Close the valve A immediately, and restart the operation
from procedure (3).
P2
Operation is interrupted. Close the
valve A immedeately and check
the below items.
•
Check if the shutoff valves of
liquid pipe and gas pipe, and
shutoff valve of equalizer
pipe (in the case of the out-
door unit multi system) is
opened.
•
Check the refrigerant tank is
connected and the valve A
was opend.
•
Check if the air inlet and out-
let of the indoor unit are not
closed by an obstruction.
After correcting the
abnormality, restart
the operation from
procedure (3).
∗
Operation is stoped abnormally.
Close the valve A immediately.
Confirm the malfunction code and
correct the abnormality following
the [Remote controller displays
malfunction code] in chapter 9-2.
P9
Charging is finished. Close the valve A and take the
refrigerant tank off.
Code
The work contents
P8
Close the valve A immediately and push the TEST button
(BS4) once. And restart from procedure (7) of “In case of
heating mode”.
P2
Operation is interrupted. Close the valve A immedeately
and check the below items.
•
Check if the shutoff valves of liquid pipe and gas
pipe, and shutoff valve of equalizer pipe (in the case
of the outdoor unit multi system) is opened.
•
Check the refrigerant tank is connected and the
valve A was opend.
•
Check if the air inlet and outlet of the indoor unit are
not closed by an obstruction.
Malfunc-
tion code
Installation error
Remedial action
E3, E4
F3, F6
UF
The shutoff valve of the
outdoor unit is left
closed.
Open the shutoff valve.
U1
The phases of the
power to the outdoor
unit is reversed.
Exchange two of the three
phases (L1, L2, L3) to make a
proper connection.
U1
U4
LC
No power is supplied to
an outdoor, BS or
indoor unit (including
phase interruption).
Make sure the power source
wire is properly connected to
the outdoor, BS or indoor unit
and revise if necessary.
UF
There is conflict on the
connection of transmis-
sion wiring in the sys-
tem.
Check if the refrigerant piping
line and the transmission wiring
are consistent with each other.
E3
F6
UF
Refrigerant over-
charge.
Recalculate the additional
amount refrigerant from the pip-
ing length and correct the refrig-
erant charge level by recovering
any excessive refrigerant with a
refrigerant recovery machine.
E4
F3
Insufficient refrigerant.
• Check if the additional refrigerant
charge has been finished correctly.
• Recalculate the additional amount
refrigerant from the piping length and
add the adequate amount.
U7, U4
UF, UH
Field wiring is con-
nected to “TO MULTI
UNIT (Q1,Q2)” termi-
nal on the outdoor unit
PC-board (A1P) when
the system is one out-
door system.
Remove the line from the “TO
MULTI UNIT (Q1, Q2)” terminal.
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