Haier DW-86L288 User manual

Servic
e
e
Manu
a
a
l
Ultra‐l
DW-86L
2
DW-86
L
owTe
m
2
88•DW-86
L
486•DW-8
6
DW-86
W
m
peratu
r
L338•DW-
8
6
L628•DW-
8
W
1006•DW
-
HaierM
r
eRefri
g
8
6L388•DW
-
8
6L728•D
W
-
86W420
edical&
L
g
erator
-
86L388A
W
-86L828
L
aborator
y
FILENo
y
Produc
t
:HMRSM
t
sCo.,Ltd
‐001‐01
.


2/88

Effective models
This service manual is effective for following models
Model name Product code Voltage(V) Frequency(Hz) Plug-type
DW-86L288 BE06S8E1T 220 50 All
DW-86L338 BE0FU3E1T 220 50 All
DW-86L388 BE06RCE1T 220 50 All
DW-86L388A BE0FV3E1T 220 50 All
DW-86L486 BE06RJE1T 220 50 All
DW-86L490 BE06QGE1T 220 50 All
DW-86L626 BE03D2E1T 220 50 All
DW-86L628 BE06QLE1T 220 50 All
DW-86L728 BE0EZLE1T 220 50 All
DW-86L828 BE0F09E1T 220 50 All
DW-86W100 BE0385E1T 220 50 All
DW-86W420 BE0381E1T 220 50 All


3/88

Content
●● Designation ...........................................................................................................................................5
●● Introduction to product features ............................................................................................................6
●●Product appearance...............................................................................................................................7
●●Parts layout ..........................................................................................................................................14
1. Display structure ...........................................................................................................................14
2. Box structure .................................................................................................................................14
3. Electronic structure .......................................................................................................................17
4. System architecture.......................................................................................................................20
●●Cooling unit parts .................................................................................................................................21
●●Refrigeration circuits ............................................................................................................................22
●● Circuit diagram....................................................................................................................................23
●●Connections on Main PCB ...................................................................................................................25
●●Specifications of sensor .......................................................................................................................26
1. The value of the probe resistance varies with temperature (probe type: NTC) .............................26
2. The value of the probe resistance varies with temperature (probe type: PT100) ..........................27
●●Detailed technical data of the product..................................................................................................28
●●product nameplate ...............................................................................................................................29
●●Transportation and Installation .............................................................................................................30
1. Transportation of the product and removal of package .................................................................30
2. The product enters the placement room........................................................................................
31
3. Product installation and matters needing attention........................................................................32
●●Specifications of LCD panel .................................................................................................................35
1. Unlock ...........................................................................................................................................35
2. Temperature setting.......................................................................................................................35
3. High Temperature Alarm................................................................................................................36
4. Low Temperature Alarm ................................................................................................................36
●●Indicating of working status of display panel........................................................................................37
●●Indication of alarm status .....................................................................................................................38
●●Setting of special functions ..................................................................................................................40
1. Setting of password value .............................................................................................................40
2. Setting of start delay......................................................................................................................40
3. Calibration function .......................................................................................................................40
4. Control of condensate fan .............................................................................................................40


4/88

5.Requirements of battery control .....................................................................................................41
6. Meanings of fault codes ................................................................................................................41
7 Precautions ....................................................................................................................................42
●●Fault code ............................................................................................................................................43
The main fault codes.........................................................................................................................43
●●Product use and maintenance .............................................................................................................46
1. Principle of work:...........................................................................................................................46
2. Ultra-low temperature cabinet use ................................................................................................46
3. Pressure switch and infusion of freezing medium .........................................................................47
4. Fan parameters.............................................................................................................................50
●●Gas collection and charge....................................................................................................................51
1. Diagram of refrigerating machine ..................................................................................................51
2. Compressor parameters................................................................................................................51
3. The characteristics of the refrigerant .............................................................................................52
4. Refrigerant perfusion process .......................................................................................................52
5. Infusion flow of freezing medium...................................................................................................58
●●Refrigerant perfusion Details................................................................................................................60
●●Troubleshooting ...................................................................................................................................61
●●How to deal with High temperature alarm ............................................................................................65
●●How to deal with Low temperature alarm .............................................................................................66
●●Points needing attention during normal use of the product ..................................................................
67
1. Points needing attention during normal use-proper use................................................................67
2. Points needing attention during normal use-safety requirement ...................................................69
3. Points needing attention during normal use-disposal of special circumstances ............................73
●●Other maintenance and repair .............................................................................................................75
1. Clean storage box .........................................................................................................................75
2. Clean condenser filter screen........................................................................................................75
3. Clean filter screen with water. .......................................................................................................75
4. Defrost inner wall ..........................................................................................................................76
5. Battery maintenance .....................................................................................................................76
●●FAQ......................................................................................................................................................78
1. Common Faults Analysis and Maintenance Measures..................................................................78
2.Alarm of battery low electric quantity:.............................................................................................79
3.Alarm of dirty condenser: ...............................................................................................................80
●●Used Spare Parts Photo Gallery ..........................................................................................................81
●●Testing Date .........................................................................................................................................86

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5/88
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【Designation】
Regulationsfortypenaming:

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











Note:ratedvolumecanbethegrossvolumeoreffectivevolume;themanufacturercandecideitby
himaccordingtotheactualsituation.Theeffectivevolumevaluemustbemarkedonthenameplate
whethereffectivevolumeorgrossvolumeismarkedintheproductname.

Examples:
DW‐86L628meansthattheUltra‐lowtemperaturestoragerefrigeratorwiththetemperatureat
characteristictemperature‐86℃,horizontalandratedeffectivevolume628L.

DW XX X XXX X
Design No. is expressed with pinyin character
sequence
Rated volume value is shown with L
Classification of low temperature cabinet (W is
horizontal and L is vertical)
It shows the temperature at the characteristic point
inside cabinet (without minus mark)
(For example: temperature at the characteristic point
inside cabinet -86℃can be expressed as 86)
Low temperature cabinet
Low temperature cabinet

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6/88

【Introduction to product features】

1.1Temperatureinsidetheultralowtemperaturecabinet:‐10~‐86℃,adjustable，temperatureset
arrange‐40～‐86℃；
1.2Balancedpressuredesigninsideandoutsidethecabinet,thedooriseasilyopenedandclosed；
1.3Temperatureinsidethecabinet,highandlowtemperaturesetting,ambienttemperatureand
inputvoltagecanbedisplayedonthedisplayscreen，Highandlowtemperaturealarmand
temperatureinsidethecabinetcanbeset.；
1.4Temperatureinsidethecabinet,highandlowtemperaturesetting,ambienttemperatureand
inputvoltagecanbedisplayedonthedisplayscreen；
1.5Variousfaultalarms(highandlowtemperaturealarm,sensoralarm,highandlowvoltagealarm,
alarmofbadradiatingofthecondenser,alarmofambienttemperatureexceedingstandard,LV
alarmandpowerfailurealarm)；
1.6Twoalarmmodes(voicebuzzalarmandlightflashingalarm).,Multipleprotectivefunctions
(startupdelayprotection,LVcompensationprotectionandHVcompensationprotection)；
1.7Ithasnetworkfunctions,providedwithRS‐232datainterface,toconnectthecomputer,then
thetemperatureinsidecabinetcanbedisplacedviacomputer,todisplaythealarminformation.The
temperaturecanbecontrolledbycomputerandwhetherthemonitoringequipmentisnormal；
1.8Ithastheremotealarmfunction,toconnectthealarmequipmenttorealizealarmfuncitonof
otherrooms；
1.9HVandLVautomaticcompensationfunction.；
1.10Casterwheelsareprovided,whichareflexible,movableandlocked；
1.11Recorder,networkmonitoringsystem,shortmessagesoftware,freezingrackandfreezingbox
canbeprovided；
1.12Ithasthefunctionofshortmessagealarmcontrol,1)automaticallysendthealarmmeasageto
2usersatthesametime,2)theusercansendtheshortmeassagetomachinetoinquire
temperatureandalarm,3)theusercansendtheshortmessagetomachineviamobile,tosetthe
temperatureinsidecabinet,highandlowtemperaturealarmvalue,etc.


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7/88

【Product appearance】

DW‐86L388/486/628/728/828














8/88

DW‐86L288

DW‐86L338/388A




9/88

DW‐86L490

DW‐86W100



10/88

DW‐86W420




11/88

【Dimensions】
DW-86W100


12/88

DW-86L490












13/88

Other Modles


SN Model A B C D E F G H I
1 DW-86L388 1310 550 296 620 1960 1980 620 915 870
2 DW-86L486 1310 630 296 590 1960 1980 590 945 900
3 DW-86L628 1310 630 296 760 1960 1980 760 1035 900
4 DW-86L728 1310 630 296 870 1960 1980 870 1145 900
5 DW-86L828 1310 710 296 870 1960 1980 870 1145 980




14/88

【Parts layout】
1. Display structure










2. Box structure

Locked
network
Run
re
g
ulator
Back s
y
stem
High temp
alarm
Low temp
alarm Sensor failure
Low batter
y
Condenser dirty
High ambient
temperature
Buzzer cancel
Shelf:replacethe
shelfaround45°
Shelfstrips
Innerdoor:PU
foamstructure
Theinnerdoor
outerseal
Innerdoormiddle
seal
Maindoors:PU
foamstructure+VIP
Outerdoormiddle
seals
Outerdoorouter
seals
Chartrecorder
Inletgrille
Power failueImproper
voltageambient
temperatur
Voltage
Maindoorhandle


Main
s
cover
senso
Stainl
e
shelvi
n
B
o
dec
o
s
enser:The
f
ofthemain
rinthebox
e
sssteel
n
gfixedcla
m
o
xbeams
o
ratedbar
f
ixed
m
p

15/88


Innercol
o
Material:
steelshe
e
o
r:Creamye
l
electro‐galv
a
e
t
Inner door
h
replace dis
m
handle the
c
rotation of t
h
Cabinetmo
u
l
low
a
nized
h
andle:
m
antled
c
enter of
h
escrew
u
th





T
C
C
Theca
Thec
a
P
Doorh
Nam
e
num
b
S
T
esthole
C
O2backup
s
C
abinguard
p
binrightgua
r
a
binleftgua
r
P
owercode
inge(under)
e
plateand
b
er
S
enserhole
s
ystem
p
late
r
d
r
d
serial

16/88


Powe
Batte
rswtich
ryswtich

M
a

3. Elect
r



a
in control bo
a
Lowte
m
pressuri
z
Thehig
h
BuckAC
Transfor
m
Batt
e
Conde
n
r
onic str
u
a
rd
m
perature
z
edACconta
c
h
temperatur
e
contactor
m
er
e
ry
n
ser
u
cture
c
tor
e

Ele
c

17/88
c
tricalcontro
l
box
Remote
alarm
wirin
g

W
R232/
4
port
m

W
iringboard
Relay
4
85serial
m
odule
Batter
y
Switch
Switch
Condens
e
Fan
y

e
r


18/88

















High temperature
compressor
Low
temperature
compressor
Condensation
fan
Induced draft
fan
Standby
Pressure
increase
Pressure
decrease
MotherBoard


19/88











Network
connection
Display
panel
connection
Temperature
regulation
screw
Master sensor
Condenser
sensor
Heat
exchanger
sensor
Computer panel test key: under the
condition of power ON, press down the
test key and see if all relay lamps are
lighting in continuous cycle, otherwise,
check if the relays that are not lighting
have failure.
Ambient
temperature sensor
MotherBoard
Voltage
adjustment
Screw


20/88

4. System architecture




Compressor: look from the back
The left: High temperature stage
The right: Low Temperature stage
High-stage
gas-liquid
separator
High‐temperature
filter
Low‐temperature
filter
Anti‐dewtube
Hightemperature
condenser
Condenserfan
Oilseparator
LowTem perature
pressurecontrol
valve