Check List On Compressor - Hitachi RAS-(3-6)HVNC1(E) Service Manual

7 Test run
7.6.2 Check list on compressor
CLIENT:
Serial number:
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 expansion valve (MV1) correctly
7
connected?
Is expansion valve (MV1) coil co-
8
rrectly connected?
Are the refrigeration cycle and
9 electrical wiring system incorrectly
connected?
Is opening of expansion valve
10
completely closed (locked)?
Is opening of expansion valve fully
11
opened (locked)?
Are the contacts for compressor
12
magnetic 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?
204
SMGB0087 rev.0 - 12/2013
MODEL:
Production date:
Check method
(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
(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.
(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
inserted.
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 temperature (TL) < air intake
temperature
(Ti) during cooling operation
(2) Liquid pipe temperature (TL) > air intake
temperature
(Ti) during heating operation
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
Check the surface of each contact (L1, L2
and L3) by viewing.
Check to ensure that voltage imbalance is
smaller 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