Hitachi R-T310ERU1 Service Manual

TABLE

SPECIFICATION ............................................................................................

2

MAIN PARTS COMPONENTS ..................................................................................

2

BASIC OPERATION..................................................................................

3

RESISTANCE VALUE ..................................................................................

4

ERROR CODE ..................................................................................

5

CIRCUIT DIAGRAM ..............................................................................

6

PARTS CONSTITUTION

MODEL:R-T310ERU1 .............................................................................................

7-18

SPECIFICATIONS

TYPEDOUBLE DOOR
MODEL
POWER SOURCE 1Ø,220V-240V,50Hz
POWER INPUT ( W )120
TOTAL CURRENT ( A )0.9
VOLUME260L

600

1560

655

NET WEIGHT ( Kgs )54

NO. 2022E

REFRIGERATOR

H.C.P.T.

OCT'2010

R-T310ERU1 (SLS,PWH,PBK)

R-T310ERU1

SERVICE MANUAL

DIMENSIONS

(mm)

TOTALNET

W
H
D

HITACHI

PT

NO. 2022E

R-T310ERU1 (SLS,PWH,PBK)

GENERAL SERVICE

1.

In order to disassemble and repair the

unit in question, be sure to disconnect

the power cord plug from the power

outlet before starting the work.

2.

If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and the

replacement must be effected in correct manner according to the instructions in the Service Manual of the unit.

3.

After completion of repairs, the initial state should be restored.

4.

Lead wires should be connected and laid as in the initial state.

5.

Modification of the unit by the user himself should absolutely be

prohibited.

6.

Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.

7.

In installing the unit having been repaired, be careful to prevent the occurrence of any accident such as electrical

shock, leak of current, or bodily injury due to the drop of any part.

8.

To check the insulation of the unit, measure the insulation resistance between the power cord plug and grounding

terminal of the unit.

The insulation resistance should be 1M

or more as measured by a 500V DC megger.

9.

The initial location of installation such as window, floor or the other should be checked for being safe enough to

support the repaired unit again.

If it is found not so strong and safe, the unit should be installed at the initial location after reinforced or at a new location.

10.

Any inflammable object must not be placed

about the location of installation.

11.

Check the grounding to see whether it is proper

or not, and if it is found improper, connect the

grounding terminal to the earth.

SAFETY DURING REPAIR WORK

First, I must disconnect

from the power outlet.

If the contacts of electrical parts are

defective, replace the electrical parts

without trying to repair them.

DANGER

the power cord plug

Ω

1

SPECIFICATION

MODEL
COMPRESSORPTR-T310EM 001(FL1152-SH)
STARTING DEVICEPTR-250EX 021(PGT0SAT)
OVERLOAD RELAYPTR-200WGX 037(1.4C36A3)
STARTING CAPACITORPTR-47KP 003(3μF/400V)

AMBIENT TEMPERATURE SENSOR

REFRIGERATOR SENSORPTR-T300W 034R (O°C) = 6.35 k Ω ± 2 %
REFRIGERATOR CHARGING R-134a (kg)
TEMPERATURE FRESH FOOD
CONTROL FREEZER
DEFROSTING WAY
DEFROSTING INITIATION
SYSTEM TERMINATION

EVAPORATION

FREEZER ****

PTR-Z400V 050

R-T310ERU1

R (21°C) = 12 k Ω ± 3 %
R (25°C) = 10 k Ω ± 2 %

0.095
DIAL

SELECT DAMPER DIAL

HEATER
F:AUTOMATIC,R:AUTOMATIC
F:AUTOMATIC,R:AUTOMATIC

FORCED

YES

OTHER FEATURE

MINUS-ZERO COOLING
NANOTITANIUM

NO

YES

MAIN PARTS COMPONENTS

COMPRESSORPTR-T310EM 001(FL1152-SH)
PHASESINGLE PHASE
RATE VOLTAGE ( V )220
RATE FREQUENCY ( Hz )50
POLE NUMBER2

MS

CONNECTION

RESISTANCE VALUE 75°C

MAIN COILSTARTING COIL

C

M - C = 23.8 Ω

S - C = 42.4 Ω
STARTING CURRENT (A)
DEFROST HEATER

6.0

230V/165W/322.7 Ω

2

Off-time
Defrosting
R-sensor≧High temp.
R-sensor≦Low temp.

Comp. on
Comp. off

Off

3

Comp.Condition

Off
Off
On
Off

ConditionR-Fan

On

●Comp.

●Power

supply

●R-Room
Temp.

●R-Fan

●Evaporator

Temp.

●Defrost
heater

●R-Lamp

High temp.(4℃)
Low temp.(2℃)

On

R-sensor

On

Open

On

●R-Door
(R-Door sw)

8.5℃

D-sensor

On

On

～～～～～～～～

Off-time
10min

～

t1t2t3t4

Pre-Cool

Off-time
10min

Pre-Cool time≦30min

Basic operation(time chart) of 260-290L (STD) REF.

Comp. On-time：
t1+t2+t3+t4+…≧12h

High

Priority

Off-time
10min

High

Priority

Defrosting

25 s

RESISTANCE VALUE RESISTANCE

Temp.ResistanceTemp.ResistanceTemp.Resistance

(℃)(Ω)(℃)(Ω)(℃)(Ω)

～～～～～～

-2019.23k-58271.14k-20105.38k

～～～～～～

-1514.26k-2019.17k-1582.03k

-1010.78k-1010.83k-1060.86k

-58.23k-58.27k-545.67k

06.35k06.38k034.62k

54.94k54.97k526.52k

103.88k103.90k1020.50k

153.08k153.09k1515.99k

202.46k202.47k2012.00k

251.98k251.98k259.97k

301.60k301.61k307.97k

351.31k401.08k356.42k

401.07k500.74k405.20k

～～～～～～

600.51k610.50k622.32k

～～～～～～

R-sensorD-sensorTC-sensor

4

Normal
range

Abnormal
range

Abnormal
range

Display
Error code

Display
Error code

ERROR CODE

Priority

sequence

Error code

(LED on PCB)

Breakdown

list

Breakdown

description

Operation

11s ON + Blink twiceR-sensor abnormalR-sensor value abnormalProvisional mode

21s ON + Blink 3 timesTC-sensor abnormalTC-sensor value abnormalDisplay error code

31s ON + Blink 4 timesD-sensor abnormalD-sensor value abnormalNo defrosting

4Blink twice

EEPROM data
abnormal

EEPROM data
abnormal

Display error code

5Blink 4 times

Defrosting circuit
abnormal

Defrosting continues
even after 2 hours

After 2 hours,stop defrosting
and display error code

63s ON + Blink twiceRefrigerator not cool

R-sensor stays over 10℃
for 72 hours

Display error code

5