Check List On Compressor - Hitachi RAS-(3-6)HVRNM2E Service Manual

7 Test Run

Check list on compressor

CLIENT:
Serial N°:
N° Check item
Is THM9 correctly connected?
1
THM9: Discharge gas thermistor
2 Is thermistor THM9 disconnected?
3 Is current sensor faulty?
Is current sensing part on PCB2
4
faulty?
Is the direction of current sensor
5
(CTU, CTV) reverse?
Are power source wires, U and
6 V inserted correctly into current
sensor?
Is exp. valve (MV1) correctly con-
7
nected?
Is exp. valve (MV1) coil correctly
8
connected?
Are the refrigeration cycle and
9 electrical wiring system incorrectly
connected?
Is opening of exp. valve completely
10
closed (locked)?
Is opening of exp. valve fully ope-
11
ned (locked)?
Are the contacts for comp. magnetic
12
switch CMC1 faulty?
Is there any voltage abnormality
13
among L1-L2, L2-L3 and L3- L1?
Is the comp. oil acidified during
14
compressor motor burning?
187
SMGB0064 rev.0 - 08/2011
MODEL:
Production date:
Check method
(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
(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.
(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.
Check the direction => by viewing.
Check to ensure that wires are correctly inser-
ted.
Check to ensure that MV1 to CN5A is correctly
connected.
Check to ensure that each coil is correctly
mounted on the valve.
Check to ensure that refrigerant is flowing into
indoor units by operating one refrigerating cycle
only from the outdoor unit.
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
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
Check the surface of each contact (L1, L2 and
L3) by viewing.
Check to ensure that voltage imbalance is sma-
ller than 3%. Please note that power source
voltage must be within 380V or 220V+10%.
Check to ensure that the oil color is not black.
DATE:
Checker:
Result Remarks
7