Hitachi RAS-(4-12)HNP(1)(E) - Check List on Compressor

7 Test run
204
SMGB0087 rev.0 - 12/2013
7.6.2 Check list on compressor
CLIENT: MODEL: DATE:
Serial number: 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 indica-
tion of Td when compressor is operating.
Td: Temperature of THM9
2 Is thermistor THM9 disconnected?
(1) Check to ensure that thermistor on the
top of compressor 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 expansion valve (MV1) correctly
connected?
Check to ensure that MV1 to CN5A is
correctly connected.
8
Is expansion valve (MV1) coil co-
rrectly 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 owing
into indoor units by operating one
refrigerating cycle only from the outdoor
unit.
10
Is opening of expansion valve
completely closed (locked)?
Check the following by the check mode of
outdoor units.
(1) Liquid pipe temperature (TL) < air intake
temperature
(Ti) during cooling operation
(2) Liquid pipe temperature (TL) > air intake
temperature
(Ti) during heating operation
11
Is opening of expansion valve fully
opened (locked)?
Check to ensure that liquid pipe temp. is
lower than air intake temperature of
stopping indoor unit when other indoor
units are operating under cooling operation
12
Are the contacts for compressor
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 acidied during
compressor motor burning?
Check to ensure that the oil color is not
black.