Test Run; Before Test Run - Mitsubishi Electric Mr. Slim SEZ-KD09NA4 Manuel D'installation

8. Electrical work
Note:
• Whenever changes are made to the function settings after installation or maintenance, be sure to record the changes with a mark in the "Setting" column of the
Function table.
Function table 1
Select unit number 00
Mode
Power failure automatic recovery*1
(AUTO RESTART FUNCTION)
Indoor temperature detecting
LOSSNAY connectivity
Function table 2
Select unit numbers 01 to 04 or all units (AL [wired remote controller]/07 [wireless remote controller])
Mode
Filter sign
External static pressure
*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
appropriate check filed of the tables.

9. Test run

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 .
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 .
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
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 , 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.
9.3. Self-check
s Refer to the installation manual that comes with each remote controller for details.
s RF thermostat is not establised.
[Output pattern A] Errors detected by indoor unit
Wired remote controller
IR wireless remote controller
RF thermostat
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code
(Number of times)
1 P1
2
P2, P9
3 E6, E7
4 P4
5 P5
6 P6
7 EE
8 P8
9
E4
10 –
11 –
12 Fb
No sound
– –
14
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)
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)
• The insulation resistance drops due to accumulation of refrigerant in the com-
• To operate the compressor with refrigerant accumulated in the compressor,
4. If the insulation resistance rises above 1 M , 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.
due to refrigerant accumulat-
- 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.
9.2. Test run
s Refer to the installation manual that comes with each remote controller for
details.
Symptom
Intake sensor error
Pipe (Liquid or 2-phase pipe) sensor error
Indoor/outdoor unit communication error
Drain sensor error
Drain pump error
Freezing/Overheating safeguard operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
–
–
Indoor unit control system error (memory error, etc.)
No corresponding
Mode no.
01
02
03
Mode no.
07
08
10
pressor. The resistance will rise above 1 M
up for two to three hours.
(The time necessary to warm up the compressor varies according to atmos-
pheric conditions and refrigerant accumulation.)
the compressor must be warmed up at least 12 hours to prevent breakdown.
Setting no. Initial setting Check
1
2
1
2
3
1
2
3
Setting no. Initial setting Check
1
2
3
1
2
3
1
2
or other mark in the
after the compressor is warmed
Remark