Check list on compressor
CLIENT: MODEL: DATE:
Serial N°: Production date: Checker:
N° Check item Check method Result Remarks
1
Is THM9 correctly connected?
THM9: Discharge gas thermistor
(1) Is wire of thermistor correctly connected by
viewing?
(2) Check to ensure the 7-segment indication of
Td when comp. is operating.
Td: Temperature of THM9
2 Is thermistor THM9 disconnected?
(1) Check to ensure that thermistor on the top of
comp. is correctly mounted by viewing?
(2) Check to ensure that actually measured
temp. is the same as the indication during check
mode.
3 Is current sensor faulty? (1) Check to ensure that indication A1 and A2
are 0 during compressor stopping.
(2) Check to ensure that indication A1 and A2
are not 0 during compressor running.
4
Is current sensing part on PCB2
faulty?
5
Is the direction of current sensor
(CTU, CTV) reverse?
Check the direction => by viewing.
6
Are power source wires, U and V
inserted correctly into current
sensor?
Check to ensure that wires are correctly
inserted.
7
Is exp. valve (MV1) correctly
connected?
Check to ensure that MV1 to CN5A is correctly
connected.
8
Is exp. valve (MV1) coil correctly
connected?
Check to ensure that each coil is correctly
mounted on the valve.
9
Are the refrigeration cycle and
electrical wiring system incorrectly
connected?
Check to ensure that refrigerant is flowing into
indoor units by operating one refrigerating cycle
only from the outdoor unit.
10
Is opening of exp. valve completely
closed (locked)?
Check the following by the check mode of
outdoor units.
(1) Liquid pipe temp. (TL) < air intake temp.
(Ti) during cooling operation
(2) Liquid pipe temp. (TL) > air intake temp.
(Ti) during heating operation
11
Is opening of exp. valve fully opened
(locked)?
Check to ensure that liquid pipe temp. is lower
than air intake temp. of stopping indoor unit
when other indoor units are operating under
cooling operation
12
Are the contacts for comp. magnetic
switch CMC1 faulty?
Check the surface of each contact (L1, L2 and
L3) by viewing.
13
Is there any voltage abnormality
among L1-L2, L2-L3 and L3- L1?
Check to ensure that voltage imbalance is
smaller than 3%. Please note that power source
voltage must be within 380V or 220V+10%.
14
Is the comp. oil acidified during
compressor motor burning?
Check to ensure that the oil color is not black.
7 Test Run
187
SMGB0060 rev. 1- 12/2010
7
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