Download NotE

Test run
Service Manual
6.1.Checking procedure before the test run
Test run should be performed according to the Table 6.2. And use the Table 6.1 for recording test run .
$ WARNING
nDo not operate the system until all the check points have been cleared .
A)Check to ensure that the refrigerant piping and transmission between outdoor unit and indoor units are connected to
the same refrigerant cycle. If not, it will cause an abnormal operation and a serious accident .
B)Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between ground
and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and
repaired .
C)Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the system .
D)Check to ensure that the switch on the main power source has been ON for more than 12 hours, to warm the
compressor oil by the oil heater .
E)Check that the refrigerant piping and the electrical wiring conform to the same system, and check that the dip switch
setting of the refrigerant cycle No. (DSW1 & RSW1 [O.U.], DSW5 & RSW2 [I.U.]) and the unit number (RSW) for the
indoor units apply to the system .
Confirm that the dip switch setting on the printed circuit board of the indoor units and the outdoor units are correct .
Especially, pay attention to the setting of lift between indoor units and outdoor unit, the refrigerant No. and the end
terminal resistance. Refer to the chapter “6. Electrical Wiring” .
F)Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between ground
and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and
repaired. Do not impress the voltage on the terminals for transmission 1 and 2 .
G)Check to ensure that each wire, L1, L2, L3 and N (R, S and T) is correctly connected at the power source .
If incorrectly connected, the unit will not operate and the remote control switch will indicate the alarm code “05”. In
this case, check and change the phase of the power source according to the attached seat on the reverse side of the
service cover .
H)Check to ensure that switch on the main power source has been ON for more than 12 hours, to warm the compressor
oil by the oil heater .
nFSN2 series outdoor units does not operate within 4 hours after power supply (Stoppage Code d1-22) .
In case of operating within 4 hours, release the protection control as follows:
1. Supply power to the outdoor unit and indoor units .
2. Wait for 30 seconds .
3. Push PSW1 on PCB more than 3 seconds .
nPay attention to the following items while the system is running .
A) Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at
the discharge side are heated higher than 90°C .
B) DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES). It will cause a serious accident .
nDo not touch any electrical components for at least 3 minutes after turning OFF the main switch .
nCheck that the refrigerant piping setting and electrical wiring setting are for the same system, by operating the
indoor unit one by
50
SMGB0059 rev.0 - 04/2009