14
8. Electrical work
9.1. Before test run
s
After completing installation and the wiring and piping of the indoor and outdoor
units, check for refrigerant leakage, looseness in the power supply or control
wiring, wrong polarity, and no disconnection of one phase in the supply.
s
Use a 500-volt megohmmeter to check that the resistance between the power
supply terminals and ground is at least 1.0 M
W
W
W
W
W
.
s
Do not carry out this test on the control wiring (low voltage circuit) termi-
nals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 M
W
W
W
W
W
.
Insulation resistance
After installation or after the power source to the unit has been cut for an extended
period, the insulation resistance will drop below 1 M
W
due to refrigerant accumulat-
ing in the compressor. This is not a malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the insulation resistance of
the compressor.
2. If the insulation resistance is below 1 M
W
, the compressor is faulty or the resist-
ance dropped due the accumulation of refrigerant in the compressor.
3. After connecting the wires to the compressor, the compressor will start to warm
up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
•
The insulation resistance drops due to accumulation of refrigerant in the com-
pressor. The resistance will rise above 1 M
W
after the compressor is warmed
up for two to three hours.
(The time necessary to warm up the compressor varies according to atmos-
pheric conditions and refrigerant accumulation.)
•
To operate the compressor with refrigerant accumulated in the compressor,
the compressor must be warmed up at least 12 hours to prevent breakdown.
4. If the insulation resistance rises above 1 M
W
, the compressor is not faulty.
Caution:
• The compressor will not operate unless the power supply phase connection
is correct.
• Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result in
severe damage to internal parts. Keep the power switch turned on during the op-
erational season.
9. Test run
9.2. Test run
9.2.1. Using wired remote controller
1
Turn on the power at least 12 hours before the test run.
2
Press the [TEST] button twice.
➡
“TEST RUN” liquid crystal display
3
Press the [Mode selection] button.
➡
Make sure that wind is blown out.
4
Press the [Mode selection] button and switch to the cooling (or heating) mode.
➡
Make sure that cold (or warm) wind is blown out.
5
Press the [Fan speed] button.
➡
Make sure that the wind speed is switched.
6
Check operation of the outdoor unit fan.
7
Release test run by pressing the [ON/OFF] button.
➡
Stop
8
Register a telephone number.
The telephone number of the repair shop, sales office, etc., to contact if an error
occurs can be registered in the remote controller. The telephone number will be
displayed when an error occurs. For registration procedures, refer to the operation
manual for the indoor unit.
[Fig. 9-1] (P.7)
A
ON/OFF button
B
Test run display
C
Indoor temperature liquid line temperature display
D
ON/OFF lamp
E
Power display
F
Error code display
Test run remaining time display
G
Set temperature button
H
Mode selection button
I
Fan speed button
M
TEST button
Function table 1
Select unit number 00
Function table 2
Select unit numbers 01 to 04 or all units (AL [wired remote controller]/07 [wireless remote controller])
*1 When the power supply returns, the air conditioner will start 3 minutes later.
Note:
When the function of an indoor unit were changed by function selection after the end of installation, always indicate the contents by entering a or other mark in the
appropriate check filed of the tables.
Mode
Filter sign
External static pressure
Settings
100 Hr
2500 Hr
No filter sign indicator
15 Pa (0.06 in.WG)
35 Pa (0.14 in.WG)
50 Pa (0.20 in.WG)
The same as setting of mode no.08
5 Pa (0.02 in.WG) (set mode no. 08 to 1)
Mode no.
Setting no. Initial setting
Check
1
07
2
3
1
08
2
3
1
10
2
Settings
Not available
Available *1
Indoor unit operating average
Set by indoor unit’s remote controller
Remote controller’s internal sensor
Not Supported
Supported (indoor unit is not equipped with outdoor-air intake)
Supported (indoor unit is equipped with outdoor-air intake)
Mode no.
Setting no. Initial setting
Check
1
01
2
1
02
2
3
1
03
2
3
Mode
Power failure automatic recovery*1
(AUTO RESTART FUNCTION)
Indoor temperature detecting
LOSSNAY connectivity
