5-6
5
Symptoms and Parts to Inspect
Remote
controller
alarm display
contents
Alarm
Judgement conditions
Eliminating
condition of alarm
P03
Judgement and correction
Abnormal discharge
temperature error
met egrahcsiD • p.
detected at or
above the specified
value
Stops when temp. exceeds
101 .
Alarm output on 5 pre-trips
P05
1. Check refrigerant cycle (gas
leak).
2.Trouble with electronic
expansion valve
3.Check discharge
temperature sensor (TD).
CT disconnected
or AC power supply
error
DC voltage charge
failure
1. Check outdoor unit control
PCB.
P15
The current value transmitted
from the microcomputer on the
outdoor unit control substrate is
low.
When no AC power input for
more than 30 seconds to 5
minutes : Single alarm
2. Lack of reactor wire
3. Check power frequency.
Insufficient gas level
detected.
59 si erutarepmet egrahcsiD •
or higher.
ta si evlav noisnapxe cinortcelE •
Step 480.
L18 4-way valve
operation failure
• Judged after heating
operating for
5 minutes
consecutively.
1.Check refrigerant cycle (gas
leak).
2.Trouble with electronic
expansion valve
3.Check outdoor unit valve
opening.
To +20
The indoor unit heat exchanger
temperature drops even though
the compressor is switched on
during the heating mode:
Pre-trip 1 time
P04
P22
P29
H31
High-pressure
protection error
Recovery at restart
Recovery at restart
Recovery at restart
High pressure switched
ON OFF
(Alarm is output when switch
opened.) Pre-trip 4 times.
1. Check 4-way valve.
2. Check 4-way valve wiring.
3. Check outdoor unit control
PCB.
Recovery at restart
Recovery at restart
Recovery at restart
Overload operation of
refrigerant cycle
Outdoor unit fan
motor trouble
nI • verter protection
circuit was
activated, or lock
was detected at
outdoor unit fan
motor.
Inverter stops after alarm is
detected. Pre-trip 10 times
HIC trouble
Lack of INV
compressor wiring,
INV compressor
actuation failure,
DCCT failure
1.Position detection trouble.
2.Outdoor unit fan motor over-
current Protection circuit is
activated.
lortnoc tinu roodtuo kcehC •
PCB.
• See outdoor unit fan
judgement methods.
Pre-trip consecutively 10 times
Recovery at restart
Temperature dropped
Inverter stops after alarm
is detected. Alarm is output
when inverter stops (pre-trip)
consecutively 10 times.
Heat sink and PCB (HIC)
elbuort tcatnoC •
< C1
1.Stops immediately even
when operations restarted.
aL • yer short on the
compressor
2.Check HIC circuit.
iW • ring trouble
• Secondary current ≤ Current
value of gas shortage
determination
When the above has continued
for 1 minute. Indoor air sucking
due to body thermostat max
(E1 or E2) - TA < 4
P09
Faulty wiring
connections of
(ceiling) indoor unit
panel
Recovery at restart
Ceiling cassette panel and
indoor PCB are not connected
• Correct the wiring connection
• Correct insertion direction of
connector. (Hook is outside)
Check Prior to Auto Address Setting
2
* If an outdoor unit displays an alarm, conduct this process after diagnosing the problem.
3
2-2
Connect the wiring
Has the wiring of the indoor/outdoor control line been completed?
Is it all connected?
Is the power of the indoor unit(s) and outdoor unit(s) on?1-1
Run the auto address setting.
Run the auto address setting.
Be sure that the indoor and outdoor units are connected with
correct combination described in the catalog.
2-1
3-6
3-5
When units are networked, first set the system address for each outdoor unit in the order
1-2-3 and then run auto address setting.
2-2
Has high voltage (over AC200V) been applied to the control line
circuit? Has the fuse on the control PC board blown?
(Check each board of the indoor unit(s) and outdoor unit(s).)
3-1
Be sure that the indoor and outdoor units are connected
Be sure that the detailed setting items are made at factory setting.
with correct combination written in catalog.
3-3
3-6
Is the indoor/outdoor control line connected to more than one
outdoor unit? (Network wired?)
3-2
Correct the setting
3-4
3-3
Is the Terminal resistor select switch (CN-TERMINAL) on the outdoor
control PC board set to just one unit?
3-5
Power on
2-1
2-3
3-1
Correct the connection
3-2
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No 3-6
Correct the connection
4-2
4-3
Yes
Yes
No
No Correct the setting
Are other outdoor units using a duplicate setting?3-4
2-3
Installation
4
[ U3, F3 ]
Relocation
and resetting
of address
or setting
related
The power line and indoor/outdoor control line are miswired. Turn off the power, check &
correct the miswiring and then make connections of the indoor/outdoor control lines to the
emergency side of all the control PC boards and controllers.
Indoor/
outdoor
control line
Address
1
Auto
Factory setting
Item code Item Value
11 0
99
99
99
Indoor unit capacity
Indoor unit address
Group conrol address
System address
12
13
14
For information on the remote control’s detailed settings, refer to the Reference Materials.
4-1
4-2
4-3
SM830281-00_欧州向け R32シングル TD＆SM.indb 6 20/01/09 15:05:10
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