AIR COOLED WATER CHILLERS -SCREW TYPE
Contents
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4. LOvOOr ANDY E J E E Z E J LOVO9E ANDY B n Es ur siepow 55 S GH Ss S de ye Mes de JE 1 TE na KD O O e O e Q e O 4 B E s E aE 4 999 9d agga rgd zog ya zagad agd LNdd LNad J E E e x 5 EI z E god Is z Is ie cy ee Ks sf jo ZLNO 2 E 2994 Ed J god NOILdO T419 a fon Qqaads NV4 AN 1 iji Nl iji 33824 g d rgd z3H d agod ge 49 153 1 243 N diN a a2 2 ev E 2 2 ZS LT ELECTRICAL WIRING 2 3 MAIN CIRCUIT BOARD MAIN PRINTED CIRCUIT BOARD MASTER
5. LINDYID YAMOd N N LC90SM3X Oo Lovooz INO LOVO8lL 3n a L VOSL SANDY x 9 Lu ER Lu 34 34 zd Jd 34 Jd 34 34 zd zd 34 34 o m Cun 521 e m PLN SL on um 1 9 MENO A Aetna eo m L N NOLLJO NOLO NOLO Lu 83d EINO sano 7824 IL ZANI zano 894 3 ZANO 0 gt 3 4 god 7 i395 9 4 mag tr agd 3 4 O 575 571 873 73 875 tcc m RN IN V 5 44d I ule 3 Ax 5 Ax 3 T AXI 3 p E co a ni bk dN E mum 45 m Wea mj A f Lal MIR f o 940 OMO 240 oc Sun TUR ae Vo 4 3 o oe PI 9 ml A 2 E43 u3 LE 12 ea T d d 2 2 2 22 d d Lu 2 2 y d 2 2 2 2 etl l l ZTS O tc IS EFS tc o LL 2 o rr o tc o a ECIOSMAX LOVOLZ2 ANDY LOVOre ANDY
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7. LOVOZL SINDY LOV09 ANDY ANDY LOVOr ANDY S 9poIN agod NOILdO 119 53345 NY4 Nod Fs a R 5 Z 882d c im zB HL ae god 99d INOS rsa 3 jj Bod 2 2 2 2 S6905S 3X crs LM LINDYID TOH LNOO 9Z90SMAX LOVOVL ANDY LOVOcL ANOY LOVOOL ANOY lt LOVO8 ANDY S 9po N z it iji 299d 3854 5 Re v M NOILdO THLO S 33498 NY4 sy 3 c E E 9 e zl E E O E agod i E is 3 UND eo Lag oq 5104 ae INOS 2 e oc rsuq3 243 g 5 god lt LL NaN z 5 e 2 6 ETL o ZIS lt TA O d 3 Oo tr u m 5 LINDYID N
8. WO N LEIOSMAX 5 NOY c LOVO8lL ANDY LOVOSL ANDY lt o z 00 a I i m 999 23934 O NOLLdO THLO 53345 NvJ o o 5 O tc ci 5 5 FN Ey IND LA Nds S E 3 A T 1 5 5 H 399d 5 cag3d 20g oq Lago 99d ri LNO4 el 5 rsg 4 Od tc O 5 pad 2 2 zs 2 fa o tc o o tc Oo LINDYID 8790S 4x LOVOL2 ANDY LOVOre ANDY 10 il 1H 3H2d eg Od zagad ugod NOILdO THLO Qaads NY4 LNOd o 5 dd 33 B2 38 ul Cm UJ m m ug x MM 5 l4 15 l o So S S cc ay a d aod Em I Es 5 dE 2E dE 3 9 dc Sue SIE 2l E E uno A 2d 20gdd g3d 982d d INO4 2 o isa c 5 ac 33 Od 5 oc m l m N d z 2 2 E Eu o T Y o 3 c Oo tc Z o O LINOYHIO IOYLNOO 5 N CONTROL CIRCUIT FOR RCUE 300AG1 RCUE
9. te N N 8 0S33X 9 AFZOG 40J 242 5 qA Sfeulwsal AOFZ 0ccOV 40J He 5 7 Sb Sjeuiuue oc jacana 9 0UI8H 0 195 eq jjeus YOIIMG uomejedo uo YOJIMG 1340 eDueu2 e201 ejouleH 440 i i A A i eem NO 460g 610184 peuuoped eq ieys Duies eui Ily L a o Sv7261 z 310 LON 2 MS SW utu ra 440 440 5 NNI NO oq CVH WW CHE Laqow a E OG NC 440 i A A A I 07165 MO7 ON n no 0 no n Pes es o LSPS GL insa TWAYON ER 9 i e L6 OG 6l gl ZL 38 SL eL eL 6 g L 9 god UIEN 10 LMSA 104 Uu00 eBeyoA esr ON EE PR i VM Dunes uos dig 3dOMW Buu Jowoysng sejo o 9 YOM Jo3uoo eyoujes 1 jo eseo U JOULNOD 39V L10A MO1 40 ONILLAS uoneJedo awl duing 5s sepa OS PET uondo VoM uos J03ju09 ejoules T GG vS uondo uoimMs einsseld 9240 9 dV uos B de dung Wav Vv 7 44O NO io m as ZuSad e D E 5 90 99 dul d d 59 949 9 m A dio LIEN o G G B 6 6 5 5 2 6 2 q 3 q V amp Oc 6l 8 LL gi GL ei Gg v tc AG 5 A E 80 Ad 880d Ad agod kaal 949d a apzog WNOIS 5 aseua oc JEUS 9JIM SIU tc E uoneJedo 100 910U
10. m Check rotative direction m Repair to correct direction control is activated 3 alarm Air mixed m Open Air Vent Valve m Evacuate Air Thermistor Failure p T alarm Check inlet temperature of i alarm chilled water Replace Thermistor 5 alarm 5 alarm 1124 TROUBLESHOOTING The heat load is bigger than cooling capacity Calculate heat load gt Replace to larger unit Gas leakage or shortage of gt Check super heat gt Charge correct quantity after refrigerant checking gas leakage Expansion Valve Clogging gt Check clogging P Remove clogging Check to make sure that no difference of temperature y m gt Strainer Clogging before and after of the strainer Replace staner exists Lowi pressure Pipir Check to make sure that no E y ping gt difference of temperature gt Remove clogging Low prosene is excessively logging between piping exists ow Low pressure control is Check to make sure that no E difference of temperature Ly eer Check Valve Malfunction __p before and afterof check valve Replace check valve E i L 26 L6 alarm exists Check the difference of Shortage of water flow temperature between inlet and Increase water flow outlet of ch
11. Check wiring around pump and thermal relay for pump TROUBLESHOOTING yey 1 4 ANALYSIS AND COUNTERMEASURE OF ABNORMAL RUNNING Chiller unit has various kinds of protection device When the operation is not correct status due to the activation of some protection device refer to the table below and find out the main reason to take a countermeasure 1 failure can affect other different conditions Thus do not check only 1 point but analyze it from overall viewpoint in detail Phenomenon gt Cause gt Check Point m Countermeasure Power Failure m Measure voltage by tester P Wait the recovery of power source Power is OFF gt Check power switch Power Switch ON Wiring Short Circuit gt Check falling of wiring coating Eliminate short circuit and replace fuse Fuse for n r nee power Wiring Earth Fault Measure insulation resistance Eliminate the earth fault and replace fuse source is z melted Compressor Motor Failure gt Measure the interphase w Replace compressor and fuse P Fan Motor Failure gt resistance insulation resistance m Replace fan motor and fuse Wiring Short circuit Check falling of wiring device Eliminate short circuit and
12. Is printed circuit board for relay PCBp connector CN25Ts Plug Wiring Repair correctly connected Yes Disconnect connector and measure resistance Is the resistance correct Replace thermistor Replace printed circuit board for relay PCBp Thermistor resistance KQ Conn oe aono o ds 20 15 10 56 0 5 10 15 20 25 30 35 40 45 55 60 Temperature C Thermistor for Suction Gas Temperature characteristics TROUBLESHOOTING iyyE m L 2 L5 z2 1 Discharge Gas Pressure Sensor Abnormality Malfunction of pressure sensor Is connector CN28Pd on the printed circuit board for relay Connect correctly correctly connected Is DC24V between connector CN28Pd PIN1 and PIN3 on the printed circuit board for relay PCBp Replace the printed circuit board for relay PCBp Is less than DC 0 1V or more than DC 4 9V between connector CN28Pd PIN2 and Replace the printed PINS on the printed circuit circuit board for board for relay PCBp when relay PCBp discharge gas pressure sensor is connected Is discharge gas Remove clogging pressure sensor in the pipe connecting pipe clogging No Discharge gas Pressure Sensor Abnormality 119 m L 28 LE 7 Suction Gas Pressure Sensor Abnormality
13. 4 8 8 IND na wS MS WS ws e i Waviv 4 n Nod 1 O onse ODOOODODOOQOOOODODOOQODDOLU A v 440 NO O E OLNOd 34 CINOJ IE LNOd ES GINOd LNOd ODODOODODOOOOOOODODOCODDOD 3 2 26 zs Cie BEES EE mE SR Re os sng 03H INT E BEE y i 5 4 d E le Loop ge ze god KOG se ud REM So f T mM NOJ 85d VLOCNOd 80d G S uodo YyouMS eunsseJg m Gy oy Jaye 119 uondo YMS 1041009 ejouies YSLSVW GHVOE LINDYIO Q3 1NIHd NIVIN c 90S 3X LOVOOF INDY Lovoge INDY eo LOVOEE INDY Llovooe INDY eee VvLN2 lepow t Elo pu 3 sus 7 gays 988 u Aes OLN2 2 L9vocegnoH LIVGOSANOY peeds ue4 6 ug s o a O a ceo z o as o a EIS ojn a le z amp l NAA 0 m EE oO D 8 0 WENOd LES 3 Ve z o o o o STLN2S sii VZNO LNO oo ADE X SINS Adee HcNOd a Zz to o o 33 E VEE 41
14. Pilot Lamp for Remote Migi Pressure Sensor RE Indication Unit Operation Field PS44 Low Pressure Sensor OL41 5 Supplied THMi Water Temperature CMP Contactor for Pump Thermistor THMo1 Outlet Water Temperature TRP Thermal Relay for Pump 02 03 Thermistor THMr2 1 3 Cooler Inlet Refrigerant Thermistor SVEn Solenoid Valve for Economizer THMd 44 Discharge Gas Thermistor PSW Ee for Or optional PFC4 n Fuse holder for Compresor Motor Circuit Breaker EHF4 n Cooler Heater Fuse holder for Compresor Fan Or optional PFFin Motor Circuit Breaker 112945 Transformers THM Atmosphere Temperature Thermistor Model RCUE 40 50 60 70AG1 RCUE 80 100 120 140AG1 RCUE 150 180 200AG1 RCUE 240 270AG1 RCUE 300 330AG1 RCUE 360 400AG1 Az N S N 5 6L90SM4X oc LOVO INDY a LOVO9 INDY LOVOS INOJ LOVOF INDY O SIepow l Lu NOLLdO 5894 I SN ANON 3 Neto 3 4 E EET m eed F AGL 08 d ma NOlLdO OW H3 uS Ji 1040 SIND 5 ND i000 Hyv Ll 243 143 He e d d d a d d a ie 9 ad LINOYID H3MOd
15. gt fontan 2 Air Short Circuits in Chiller Unit__ gt Remove short circuits Air temperature through air side heat exchanger is Another heat d excessively high L aroun 9 Remove heat source chiller unit Refrigerant excessive Chock cyaledemperature Charge correct Discharge pressure is charge y P gt quantity of refrigerant excessively high so that high pressure switch Non candensable qas in Turn off the unit and check the Charge refrigerant activates the refrigerant pne oS relation between water again after the C1 H1 C6 H6 9 y temperature and pressure evacuation High pressure pipe di Check clogging m Expansion Valve clogging Check clogging mE Remove clogging or Check Valve Air side heat gt l replace check valve exchanger side clogging Check the difference of Replace or clean the Strainer Clogging r temperature before and after of 39 P Strainer strainer Chilled water inlet PEETI 2 Check the status of temperature of Water side Confirm if it is within the working heat exchanger is range L 9 heat load in detail and i take a countermeasure excessively high Charge correct Discharge gas control is Suction gas temperature is Gas leakage or refrigerant uantity of refrigerant ge 9 excessively high gt 9 9 1 y rig activated shortage after checking gas Excessively super h
16. POWER CIRCUIT FOR RCUE 40AG1 RCUE 50AG1 RCUE 60AG1 RCUE 70AG1 2 2 WIRING DIAGRAM 2 2 1 POWER CIRCUIT 9 28 ELECTRICAL WIRING POWER CIRCUIT FOR RCUE 80AG1 RCUE 100AG1 RCUE 120AG1 RCUE 140AG1 LOVOrVL ANOY LOVOCI ANOY LOVOOlL ANOY LOV0O8 ano 068053 cdd dd cdd dd dd Jd dd 4d 2JA2 1JIN2 NOLLdO NOILdO ag E XX S Sigo FTI ES g Bgod ggg 375 m 24d 44d 34 34 ZHOS T AG oe d NOUdO H3 aol Wee ry 2540 1940 e IQND one T NS SOND w oND A Hay RAT ART d3 V3 htt 9 3415 QD oo h omo Moo 3 a Whore obo a LINDYID H3MOd
17. Products are manufactured according to the ISO certification system Air Conditioning Systems Operation Shimizu shi Shizuoka ken Japan ISO9001 certified by JQA Japan Hitachi Air Conditioning Products M Sdn Bnd Lot No 10 Jalan Kemajan Bangi Industrial Estate 43650 Bandar Baru Bangi Selangor Darul Ehsan Malaysia NSISOS00 14001 Certification ISO 9001 Malaysia HITACHI SMGB0002 rev 0 07 05 Printed in Spain
18. Malfunction of pressure sensor Is connector CN29Ps on the printed circuit board for relay Connect correctly PCBp correctly connected Is DC5V between connector CN29Ps PIN1 and PINS on the printed circuit board for relay PCBp Replace the printed circuit board for relay PCBp Yes Is less than DC 0 1V or more than DC 4 9V between connector CN29Ps PIN2 and PINS on the printed circuit board for relay PCBp when suction gas pressure sensor is connected No Replace the printed circuit board for relay PCBp Is suction gas pressure sensor connecting pipe clogging Remove clogging in the pipe No Suction gas Pressure Sensor Abnormality m LP L P Error comunication between Ctrl PCB This alarm code is indicated when the transmission signal between Ctrol PCB is missing more than 30 seconds Is connector CN12 on the Printed Circuit Board for CPU PCBc correctly connected Plug correctly and repair wiring Check the printed circuit board for CPU PCBc TROUBLESHOOTING m 44 4 Alarm for Operation Error Performed incorrect operation Yes Normal It is incorrect that Running operation changeover to local side during remote operation Do not perform it No Remote Is changeover to local side during remote operation Is local operation Yes Local No No Wiring Check between EETZEESP remot
19. ain j 134A 75 8 J IA vun 15 LOvOOr ANDY V sino LOVO9E ANDY bow Eo 399d 2 ze JW 1515 5330 fa 911 18443 S opo 3 3 3 9 4 PS EN EAM n on NOLO ce SLD i nN n us SX ow A X pono X SeoWot way SAY T RAY H if See 3 fos Jos SS SS S 2 L2 2 2 g jd 34 34 34 34 Jd 3d 34 23d 34 34 3d an e JN ean JN JN san 24 Sz JN ZJN 1214 h SIJAN ayn IN q E ul 4NI 5 510 SLND u ad N E M W o 2 NOLLAO NOLO NOLO cc En 5 05 a aga I E s Pa pa M Pod 894 im f fX eno Quan T 571 44 373 E soo 373 324 873 O LAI LW LW 5 A 4 lt e ll Hla mem LL 3 Ge rz 38 em xz 5 ZHOS 5 j gt j xs T AS P 98E tl P o N zo DN g i xh xh sch nec 080 2940 z940 1940 o ee m Sere nd e LOND ae PST L Sky Pp ees es gt n o Odd 4d 24d Ddd 9 amp n ua o i PC 2 2 FJ pe 22 NdN O oc L3 y zm LL l l l TT Je Fan ute o Pe 8 LINDYIOD HZMOd e N ELECTRICAL WIRING 233 2 2 2 CONTROL CIRCUIT CONTROL CIRCUIT FOR RCUE 40AG1 RCUE 50AG1 RCUE 60AG1 RCUE 70AG1
20. or low range during operation A Measure the voltage in each Compressor Drive Power Voltage Phase interphase and ask Power Excessive Current Imbalance Company for the advice Discharge pressure is m excessively high m Analyze the cause m Power Fuse melted m Replace power fuse Single Phase Loose Power Terminal Screw gt Retighten the screw Running Contact point of compressor e Motor magnetic Contactor P Replace contact points Roughness Compressor Bearing Failure m Lock Status m Replace compressor Compressor Motor F Measure insulation resistance P Compressor Motor Measure current of compressor Pump over current Over current relay gt motor m Replace over current Relay Failure Pump locked m m Remove them clogging of foreign particle Pump Over current Check the RC value and pump Change the RC value or relay is activated relay RC value gt gt ro running current replace magnetic contactor 4 alarm Wrong Pump Over current Push reset button Check the relay Failure m running current m Replace magnetic contactor Shortage of water Check the difference of 9 temperature between inlet and 39 Increase water flow Flw outlet of chilled water Water Strainer Clogging m Clean the strainer Freeze protection
21. 15 Failure of Water Outlet 2 Temperature Thermistor Open Short amp Failure of Water Outlet 3 Temperature Thermistor Open Short Malfunction Activation of Differential Pressure Control E 5 A 5E Activation of Thermal Relay for Compressor E 5F E 5 57 No Feedback Signal from Water Pump E Pu 8 P Alarm of Excessively High Water Temperature Alarm of Water Failure Differential Water Pressure Switch Option AP AP Activation of Additional Protection Device Option Flickering XX XX SEG1 SEG2 TROUBLESHOOTING 1 3 1 3 FAILURE DIAGNOSIS METHOD 1 3 4 GENERAL CHECK OF FAILURE DIAGNOSIS In the case of no segment indication unit cannot operate Is 220 240V supplied to the unit Check the power source switch Is 220 240V supplied to Is fuse broken transformer primary side Yes Replace fuse Yes Wiring check and repair Is R phase or S phase failure Is 30V in PIN1 PIN2 16 3V IN PIN3 PIN4 19 6V IN of the printed circuit board for CPU PCB connector CN2A Yes Is the wiring of transformer broken Yes a S transformer No mm Connector check Replace transformer LL Wiring check Connector check Is 26 7V in PIN1 PIN2 17 6V in PIN3 PIN4 17 6V in PIN5 PIN6 of the printed circuit board for CPU PCB connector CN2B an
22. is normal between connector PCN204 PIN1 and connector PCN 204 PIN3 on the Printed board for Relay PCBp Excessive or short power source voltage Compressor motor is locked Insulation of compressor motor is lowered Wiring Check m L 25 5 25 Phase Abnormality This alarm code is indicated when the power source phase failure or reverse phase occur Yes Phase Failure Reverse Phase Is power source phase failure or reverse phase Power Supply Wiring Check Is printed circuit board for relay PCBp connector R S T correctly Connection repair connected Is the power source of Repair to correct connector R S T part phase P 3 phase failure or reverse phase No Correct Phase Check printed circuit board for relay PCBp Interphase of power source voltage is imbalanced TROUBLESHOOTING RPP m L 24 4 24 Error comunication between Ctrl PCB and Fan speed Ctrl PCB This alarm code is indicated when the transmission signal is missing more than 5 seconds Is connector CN14A on the printed circuit board for CPU PCBzo correctly connected Plug correctly and repair wiring Yes Is connector on the printed circuit board for Fan speed control PCBz correctly connected Plug correctly and repair wiring Yes Abnormal Replace the printed Check the Printed circuit board Ss circuit board for for Fan speed contr
23. mar ADELE LINO pana e Q6NOd N dd d 6 e ZINS LOVO0r LOVOOE INDY Auo RE ts cet YALSVW 999d 6N3d 6r L gu d OODODODOODODOOODOOOODDODD OQ00000000000000000000000 05 iG TES e Nod aS dd NM D N dN LTN 3 TR N24 seaoa Lov00v3nos L9v09e3n99 N24 Eod LOVOSCANIY TOVOOSINY LovO0PSNOY LOvO9SINIY VLOZNOd 89d 1Ovoeeanos LOVOOSSNINJVLOZNOd 49d RELAIS PRINTED CIRCUIT BOARD SUBSIDIARY FI Ye AYVIGISANS quvos GALNINd SAVT3H 240 ELECTRICAL WIRING
24. q 5 Excess Low Temperature of Cooler Inlet Refrigerant E PE E5 P5 Freezing Protection Control by Cooler Inlet Refrigerant Temperature and excess low suction pressure retry operation 3 3 Activation of Freezing Protection Control E 7H Activation of High Pressure Switch E 5 q E 5 5E Activation of Discharge Gas Thermostat i E 5 Activation of Compressor Internal Thermostat 5 5 Phase Abnormally E Z 5 24 Error communication between Ctrl PCB and Fan Speed Ctrl PCB s Low Ambient Fan Speed Ctrl Option E 5 2 4 Failure of Thermistor set before Expansion Valve Open Short 74 q 5 45 Activation of Fan Motor Internal Thermostat ee z 2 Failure of Ambient Temperature Thermistor Open Short f 2 q 5 2 1 Failure of Cooler Inlet Refrigerant Thermistor Open Short 2 3 L 5 2 3 Failure of Discharge Gas Thermistor Open Short E Z 5 E A 2 5 Failure of water oulet temperature thremistor i cooler siter Open Short A Z 5 Failure of Suction Gas Thermistor Open Short E 2 Failure of Discharge Gas Pressure Sensor Open Short ZE Z 5 Failure of Suction Gas Pressure Sensor Open Short F Error communication between Ctrl PCB PCBci 2 Failure of Water Inlet Temperature Open Short tz Failure of Water Outlet Temperature Thermistor Open Short 5
25. 330AG1 0 PCBes FAN SPEED CTRL OPTION ELECTRICAL WIRING PCBos PCBo4 cre Ss TNod z n zZ O y a B e a INOS o SELNO te e 2 In Ll a a o a a M Ll 8 Sl 9 a 5 ten o z Dn a N pe 5 co ad o 9 A P Z we o LINOd FINOd E z 8 i n cA oO e a 1 nos E VELNO N al E B QS PCBa CONTROL CIRCUIT R L1 S L2 TLS MP N PCBs Models RCUE 300AG1 RCUE 330AG1 9 39 Rae UC CONTROL CIRCUIT FOR RCUE 360AG1 RCUE 400AG1 OF 9OSMAX
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27. HITACHI Inspire the Next Service Manual Maintenance Instructions AIR COOLED WATER CHILLERS SCREW TYPE RCUE40AG1 400AG1 R407C Cooling Capacity 108 kW 1068 kW TABLE OF CONTENTS 1 TROUBEESHOO TAN Giese Siete tates aar aa pu dun duis Cuban e ae aeaa a a aaa ae aaa a aaaea toi 1 1 1 OUTLINE OF FAILURE 5 2 1 2 ALARM INDICATION cecsssseeeen nnnm nnn nnn ness ns ss sn sensn asi riis isis esi renes en rese 3 1 3 FAILURE DIAGNOSIS METHOD4 1 4 ANALYSIS AND COUNTERMEASURE OF ABNORMAL RUNNING 00scscececceeeseeeeeeeeseaeeasececeeeseaeeaeeeeeenseanenseses 21 2 ELECTRICAL WIRINGQ eser eene nnn nna numum anra uada sana naa R34 R44 RR DOSE RR R4 R4 RE AAA 27 2 12 CUSTOMER VR N O irren erre eee hi Ere Cr vives ra E Eee E ae To P au vi ev 27 2 2 WIRING DIAGRAM dre iae eor ee E cn dees sp eed dndeackccbanisbes utere desee Roe L dae de copusiees dda aegexsndeetesdndeacscobiastebselece 29 2 3 MAIN CIRCUIT BOARD TROUBLESHOOTING 1 TROUBLESHOOTING 1 1 OUTLINE OF FAILURE DIAGNOSIS In the case of abnormality alarm lamp of remote control and alarm LED on the control panel are ON And segment
28. J9J JO 8585 U eseud Y E Bi t5 TJOWLNOO 31O0W3H ONISIM H3INOLSnO E 5 FOVLIOA MO1 o E CN Q 206 ELECTRICAL WIRING PARTS LIST n 1 N Mark Name Remark Mark Name Remark MC1 Compressor Motor Temperature MF 11 4 Condenser Fan Motor Liquid Temperature Thermistor OPTION MI Main Isolator EF4 5 ast Fuse 6A CMC1 n Contactor for Compressor Motor SV Solenoid Valve for Starting Contactor for Compressor Motor CMCs1 sn Start Operation SV12 n2 Solenoid Valve for Load down Contactor for Compressor Motor CMCo1 pn Delta Operation SV 13 n3 Solenoid Valve for Load up Contactor for Condenser Fan CMF 4454 Motor Hour Meter or optional Printed Circuit Board for EFC1 Fuse for Compressor Motor Circuit Breaker PCBa Display Overcurrent Relay for Compressor PCBs Printed Circuit Board for Motor Operation or optional E EFFi1 n4_ Fuse for Condenser Fan Motor Circuit Breaker PCBc1 c2 Printed Circuit Board for CPU Thermostat for PCBpip Printed Circuit Board for Relay Compressor Internal Thermostat for Fan Motor Gey eee OPTION CHin Crankcase Heater WP Maa Bic d M OPTION ARinur Auxiliary Relay PBSR REMOTE Switch for Starting OPTION OFF 2 74Mpa Push Button Switch for PSHi n High Pressure Switch ON Manual PBSR Reset Stoppage REMOTE
29. Thermal Relay for Compressor This alarm code is indicated when the compressor running current is more than thermal Relay Setting Value Is 220 240V the voltage between connector PCN207 PIN1 and connector PCN 207 PIN3 on the Printed Circuit Board for Relay PCBp No Yes activated immediately Yes Is alarm activated just after running operation No Activate after a while No Printed Circuit Is 220 240V the voltage between Board is normal connector PCN207 PIN1 and connector PCN 207 PIN3 on the Printed board for Relay PCBp Yes Wiring Check m L 57 L5 57 No Feedback Signal from Water Pump CMP pump feed back signal is not coming and Unit stops No Printed Circuit Board is normal Is 220 240V between PIN1 and PIN3 of connector PCN4 on the printed circuit board for CPU PCBc Yes Is pump thermal relay for gt pump TRP activated Yes No Check printed circuit board for CPU PCBc Check Printed Circuit Board for Relay PCBp Wiring Check breaking of wire wrong wiring Excessive or short power source voltage Interphase of power source voltage is imbalanced Compressor motor is locked Insulation of compressor motor is lowered Power fuse for compressor motor is broken Power source terminal screw loosened Thermal relay for compressor failure Compressor slide valve malfunction Check pump lock Check thermal relay for pump
30. cuit Board Failure gt Pump Breaking of Coil o Magnetic gt Replace magnetic contactor for pump Contactor Measure the voltage of contact for Pump L point of magnetic contactor Failure Loose Connection 52P Check water freeze clogging Pump locked m of foreign particle m Remove it Pump Over Pump stops current before gt Relay Pump Over current Check the RC value and gt Change the RC value or compressor Activated relay RC Value Wrong gt pump running current replace magnetic contactor running TRP 5P Alarm Pump over current p Push reset button Replace magnetic contactor relay failure and check running current 1122 TROUBLESHOOTING Pump runs but neither fan nor compressor run Pump and compressor run but fan does not run Pump and fan run but compressor does not run m Unit stops during cooling operation mos Repair the wiring ERES ND N Wiring Connection Failure Check circuit by tester gt ae ta Printed Circuit Board Failure Check circuit by tester Check i T Printed Circuit Board gt Printed Circuit Board by self gt Replace Printed Circuit Failure 3 Board checking function man Replace remote Rem
31. d CN2C Yes Is the wiring of transformer broken Is voltage in each test PIN of printed circuit board for CPU 5 V part VCCO5 GND1 V5B GND1 VCCOSN GND1 VCCR GND1 Power Source Circuit Malfunction 15V part VCC15T GND1 15V part VCC15T GND1 24V part VCC24 GND1 CPU PCBc VCC24T GND1 on the printed circuit board for CPU PCBc and Printed Circuit Board for Display and Connector Repair Operation PCBa PCBs correctly connected and checked loose connection Yes Check Printed Circuit Board for Display and Operation PCBa PCBs Check Printed Circuit Board for CPU PCBc 14 5 m L L LA LA Excessively Low Suction Pressure In case of the suction pressure is less than 0 31 Mpa during 90 seconds the unit will stop at once and indicate IE PA 3 minuts later the unit will start again This Alarm code is indicated when it occurs 3 times during 30 minutes It will retry until 2 times Is connector CN 29Ps on the printed circuit board for relay PCBp correctly connected SEEE M e n BE TUTTI MN Gens stoner ae S ne emee O pS No TROUBLESHOOTING 1 5 m L E L5 EB Low Pressure Protection by Suction Gas Thermistor This alarm code is indicated when the suction temperature is lower than 2 C during 10 seconds Is the wiring of connector in the Pr
32. e A erc 2 Lov 0805 ANON 1deox3 lt x 285 Nel UNIOZNOd 89d LLI ayog LINDYIO GALNIYd SAV1SY TF 90SM3X 19 00 1 94 40 O S Z UVGLOZNOd 890d LOVOOPO9SINDY 10 g p c z u zN04 9994 LOVOOF 09 SANDY a 404 gd ia ie 49 10 g2d LOVOOP OSSINDY Ul S U PLNOd 82d L9voOv 09g3n9N ui S U ZNO4 PEId LOVOCE 00 ANDY L9voec ooe3nos ut EC 290d 19voee oeanay v uJzN24 283d TOPON L U P LNOd 80d 1 UW ZNO4 289d rauf hr AINO j ou ae nr A mul 24H hr Folie BS ABD Sr usd LIE LIE LIE LJE JS Lege LJE S l 5 a GOR OA E OZNI EM E ZENO OO 6 a S ALA ss Ws TT yaya T
33. e control switch and printed circuit board Is 220 240V between PIN1 PIN3 of connector PCN16 on the printed circuit board for CPU PCBc Yes Check printed circuit board for CPU PCBc Yes Normal It is incorrect that Running Yes remote operation signal Is the signal transmitted p is transmitted from from option device option device during local operation Do not perform it Is optional wiring connected N a No Wiring Check between external device and printing board Yes ar Normal It is incorrect operation Is it changed over to Running that changeover to remote side during local SSS Remote Side during operation Local Operation Do not perform it No Check printed circuit board for display PCB Check printed circuit board for operation PCBs Check printed circuit board for CPU PCBc m C5 HB Activation of Differential Pressure Control This alarm code is indicated when the pressure difference between discharge and suction pressure is less than 0 3 Mpa during 3 minutes Is connector CN28Pd and CN29Ps on the Printed Circuit Board for Plug correctly and repair wiring Relay PCBp correctly connected pes Check Refrigerant oil strainer clogging C Check Refrigerant oil Quantity C Solenoid Valve for Compressor Malfunction gt Compressor slide valve Malfunction 1 20 Exe m L 5 1 L5 55 Activation of
34. eat leakage TROUBLESHOOTING 1 23 Unit stops during cooling operation gt Check valve Suction gas m Air heat exchanger side m Replace check valve temperature is Malfunction Discharge gas excessively high control is activated 3 excessive L Expansion Valve Clogging Remove Clogging E I E alarm superheat alarm m Strainer Clogging Replace or clean the strainer Discharge gas L Check thermistor resistance Replace discharge gas Thermistor Failure thermistor Fan EM m Lock Status m Replace fan motor L Check magnetic contactor Replace magnetic switch Motor Insulation Measure insulation resistance Replace fan motor Thermal relay for compressor is activated 5 alarm amp 55 alarm Compressor internal thermostat is activated C1 alarm alarm Fan internal thermostat is activated E 1 4 f alarm amp MB alarm Deteriorated Power Voltage excessively high Set voltage within working insulation Failure m m
35. er strainer exists Check to make sure that no difference of temperature Check valve mal function gt before and atter cheek valve gt Replace check valve exists Compressor Failure Check pressure cycle m Replace compressor p temperature and current P P 1 Propeller fan contacts with shroud Investigate Lp Adjust the oe of propeller Installation error or loose bolt Check each bolt if loosen Tighten up Liquid Compression tp Check suction gas temperature Ensure superheat pressure Unit is running Oil hammer gt Check suction gas temperature p Replace compressor and it makes a Noise from compressor and oil level noise mo currente DINNEAR at F Check the current to oil heater gt Replace oil heater compressor stopping P d Worn or damaged part in the Noise from inside of LM compressor gt compressor gt Replace compressor gt Beats of magnetic contactor Check the roughness of contact Replace contact points Vibration of cabinet gt Check screws if loosen Tighten up
36. illed water Clogging of Water Strainer Replace or clean the strainer Pump Reverse Rotation l Check the rotation direction j Repair to the correct direction Air Mixed P Open the air vent valve Evacuate the air Deposits on water cooler gt Check the scales inside of Clean water c oler plates water cooler Unit is running Excessive dust in air side heat but the cooling exchanger Remove it capacity is insufficient Inlet or outlet of air side heat Air flow shortage in air side exchanger is clogged gt heat exchanger Shortage of Service Space for gt chiller unit Lp Secure the service space gt Reverse Rotation of Fan Motor_ _Correct the wiring of fan motor High pressure is excessively Air Short circuits in Chiller Unit gt Repair short circuit high Air temperature through air side heat exchanger is high High pressure switch is gt Remove heat source activated e SP erem E t H C EE HE alarm Refrigerant Excessive charge gt Check cycle temperature p Charge the correct quantity Turn off the unit and check the Non condensable Gas in the relation between water Evacuate and charge Refrigerant Cycle refrigerant again temperature and pressure High Pressure Pipe Clogging gt Check clogging a Remove clogging Expansion Valve Clogging gt Check clogging gt Check to make sure that no Strainer Clogging m gt difference of temperature Replace strainer before and aft
37. indication on the control panel is flickering For stopping the unit put it into stop operation without power OFF Alarm occur Remote Control Run Indication ON Remote Control Alarm Indication ON Remote Side Segment Indication Abnormality Code Flickering Alarm Indication ON Local Side Stop Operation Is abnormality code in segment indication confirmed Abnormality code is indicated by indication mode of alarm Occurence Data Abnormality code is indicated in the segment indication Take proper measure according to the alarm position NOTE After the stop operation alarm indication is turned off and initial status 88 is displayed And then abnormality code which activated before is indicated by Indication Mode of Alarm Occurrence Data When the power turns off and turns on the indication is initial status And then abnormal code which activated before is indicated by Indication Mode of Alarm Occurrence Data 1 2 TROUBLESHOOTING 1 2 ALARM INDICATION 7 Segment indication shows the following abnormalities Without indication Unit does not run Check the power source Check the 7 segment indication Description of abnormality E q 8 L E Excessively Low Pressure 5 5 Low Pressure Protection by Suction Gas Thermistor E 78
38. ing table to the technical catalogue TROUBLESHOOTING m Cb b5 Activation of Discharge Gas Thermostat This alarm code is indiacted when the temperature in discharge pipe is higher than 140 C Is connector CN24Td on the printed circuit board for relay PCBp correctly connected Wiring check breaking of wire wrong wiring Pull out connector and measure thermistor resistance Is resistance correct C gt S n eeren CUT AN C Check PCBp Replace Thermistor 700 640 Thermistor resistance 394 300 249 162 07 100 23 135 20 0 60 80 100 120 140 Temperature C Thermistor for Discharge Gas Temperature characteristics 1 9 110 m L 1 C5 15 Activation of Compressor Internal Thermostat This alarm code is indicated when the compressor internal thermostat is higher than 115 C Is 220 240V the voltage between Yes connector PCN204 Yes Is alarm activated just after L 2 PIN1 and connector gt ee PCN 204 PIN3 on reui Jor ing running Relay PCBp the Printed Circuit Board for Relay PCBp No Activate after a while No Wiring Check breaking of wire wrong wiring No Printed Circuit Is 220 240V the voltage Board
39. inted Circuit Board for Relay PCBp correct P Plug correctly and repair wiring Ne b Replace thermistor C Check the water flow rate Check temperature Yes Yes of inlet and outlet gt Clogging of water strainer gt Pump reverse rotating check Check Printed Circuit Board gt Check the air mixing for Relay PCBp Pull out connector and measure thermistor resistance Is resistance correct Check chilled water thermostat setting value Within the working range lt gt Semester Geta BOUTTILTTCITMENMNNM gt en Bessere eq Thermistor resistance KQ oan va aon oo 20 15 10 56 0 6 10 15 20 25 30 35 40 45 55 60 Temperature C Thermistor for Suction Gas Temperature characteristics 16 TROUBLESHOOTING m L 9 L 5 H5 Excess Low Temperature of Cooler Inlet Refrigerant In case of the cooler inlet refrigerant temperature is lower than 3 C during 10 seconds the unit will stop at once and indicate E PA C 5 PA 3 minutes later the unit will start again This alarm code is indicated when it occurs 3 times during 30 minutes It will retry until 2 times Is connector CN27Tr2 on the printed circuit board for Relay correctly connected Plug correctly and repair wiring Yes Pull out connector and measure the
40. lowered TROUBLESHOOTING m tt tqi e tcz 5 25 26 25 Temperature Thermistor Abnormality This alarm code is indicated when the thermistor resistance is out of range Water Temperature Thermistor 240 Q lt Resistance lt 39 kQ Ambient Temperature Thermistor 240 Q lt Resistance lt 600 Inlet Water Temperature Thermistor Abnormality amp 5 amp Outlet Water Temperature Thermistor Abnormality Ambient Temperature Thermistor Abnormality Is connector on the printed circuit board for CPU PCBc Plug Wiring Repair correctly connected Pull out connector and measure thermistor resistance Replace thermistor Is resistance correct p Yes Replace printed circuit board for CPU PCBC C qp t8 tz 8 t 25 E5 25 19 18 18 4 17 16 15 4 13 9 13 12 Thermistor us Thermistor resistance E 10 resistance KQ z 7 5 3 5 50 4 3 8 3 1 ed 2 0 M3 t4 1 DIOS 0 0 5 20 15 10 5 6 10 15 20 25 30 35 40 45 5055 60 Temperature C Thermistor for Water Temperature characteristics 114 a L 2 L5 2 Cooler Inlet Refrigerant Temperature Thermistor Abnormality This alarm code is indicated when the thermistor resistance is out of range 72 Q lt Resi
41. ol PCBz Fan Speed PCBe Replace the printed circuit board for CPU PCBc 112 TROUBLESHOOTING m L 24 4 24 Thermistor set before Expansion Valve Abnormality This alarm code is indicated when the thermistor resistance is out of range 72 lt Resistance lt 179 kQ Is printed circuit board for relay PCBp connector CN22Te1 correctly connected Plug Wiring Repair Disconnect connector and measure resistance Is the resistance correct Replace thermistor Replace printed circuit board for relay PCBp m L 4 L 5 H5 Activation of Fan Motor Internal Thermostat This alarm code is indicated when the fan motor internal thermostat is higher than 135 C Yes Activate immediately gt Is 220 240V the voltage between connector PCN206 PIN1 and connector PCN206 PIN3 on the Printed Circuit Board for Relay PCBp Is alarm activated just after running Yes Check Printed Circuit L D Board for Relay No activate after a while Wiring check breaking of wire wrong wiring Is 220 240V the voltage between connector PCN206 PIN1 and connector PCN206 PIN3 on the Printed circuit board for Relay PCBp Yes Wiring check No Printed Circuit Board is normal Excessive or short power source voltage Interphase of power source voltage is imbalanced Fan Motor is locked Insulation of Fan Motor is
42. ote Control Switch Failure gt Operative by the unit side L control switch Coil Broken gt Check circuit by tester Fan Magnetic Contactor Replace magnetic Failure Cooling Measure the voltage between Operation Contact Point Failure contact points of magnetic contactor Fan Motor Failure gt Measure the interphase 1 Replace fan motor resistance Wiring Connection Failure 9 pe Repair the wiring Printed Circuit Board Printed Circuit Board Check cireuit by tester connection Failure Failure Thermistor Malfunction _ _Measure the thermistor resistance ___ Replace thermistor Coil Breaking gt Check circuit by tester anes dur gt Measure the voltage between Repere maon etic Contact points Failure contact points of electromagnetic contactor R A Change water temperature or z m Thermostat is activated Thermo Off change the setting temperature It is not failure Compressor Motor Failure Measure the interphase LF resistance Replace compressor Compressor Failure gt Beat noise from compressor _ p Voltage at starting up is low gt Measure the voltage gt Consult with electric power company Excessive dust in air side heat gt exchanger gt Remove it a dag E o Insufficient air in air side g 99 heat exchanger z 9 gt Shortage of Service Space for gt Secure the service Chiller Unit space gt Reverse Rotation of Fan Motor
43. perature characteristics 13 TROUBLESHOOTING aC H L5 HE Activation of high pressure switch This alarm code is indicated when the discharge pressure is higher than 2 74 Mpa Yes Is 220 240V the voltage Activate between connector immediately PCN203 PIN1 and Is alarm activated just after running connector PCN 203 PIN3 on the Printed Circuit Board for Relay PCBp1 6 SS Yes gt ca check after a while No Wiring Check breaking of wire wrong wiring No Activate No Activate a while after Compressor ON Yes PCB is normal Is high pressure switch Check clogging in air side heat exchanger Check gt se check Is 220 240V the voltage between connector PCN203 PIN1and connector PCN 203 Wiring check PIN3 on the Printed breaking of wire Circuit Board for Relay wrong wiring PCBp1 6 Yes Wiring Check map Check Printed Is alarm activated in 3 minutes after running operation PSH1 6 activated Is high pressure Switch PSH1 6 reset button activated Is 220 240V the voltage between connector PCN203 PIN1 and connector PCN 203 PIN3 on the Printed Circuit Board for Relay PCBp1 6 Circuit Board for Relay PCBp1 6 T Yes Check Printed Circuit Board for Relay PCBp 1 6 note To check the nominal value for pressure refer to safety and control device sett
44. pud 5 g ct Sr wot EH SdBZN PdBZND EN a c amp dOd tte 4 Li ex eS lata e IO sd dy 55 o 659 cum 1 4920 CO TNL SONO av A Q ct NS Sg SIZNI PIPZNO INHL NOLLdO DNO ale dad CO PNHL e Sere i er pe H ada a OND ANS SOWO b Be dg ab tc D lt fat s B EB KERE BEN i BEES T Oo SU Ul dad 3 pra m eoe 2 i S 2 iii i i i X So rL dd zu eue 54 o o E LAN 1204 EL L__7 LZNOd BHO LOO LOG 8 TEN d ized s gt e te ft TETE s t tel fle ESTE L SS c8 A cem f z T u Bio E m 80d z a i S m u 2 T QUY Y LOVOOF 09 3198 10 9 p U sejqeo ON a I CERAM LOVOC 00 3noO 104 G e u sejqeo ON n T 19v00t OSEANDY 401 GEZ L U LNDJ Bd 5 LOVOSEOOSINOY 40 v Z L U LN2J 82d tc a o LOVOOF 09e3nO 104 9 p U sejqeo ON 9 gt GYVOE LINDYIO GALNIYd SAVY 104 g e u 591389 ON ur 19vo0t 0923n9W HF S t Z 1 V VIOZNOd 82d i LOVE OOSINDY 40 v Z 1 U VLOCNOd 82d tc N Ni N Certification No saat ABNOR Hitachi Air Conditioning Products Europe S A Ronda Shimizu 1 Pol g Ind Can Torrella 08233 Vacarisses Barcelona Espa a ISO 9002 certified by AENOR Spain HITACHI is participating in the EUROVENT Certification Programme Products are as specified in the EUROVENT Directory of Certified Products
45. replace fuse Earth Fault in Operation Circuit 39 Measure insulation resistance Eliminate earth fault and replace fuse Magnetic Contactor for Compressor Motor Failure Fuse for EAE F Replace magnetic contactor and fuse operation circuit is Magnetic Contactor Measure the coil resistance melted for pump motor Failure Auxiliary Relay Coil Failure 39 L Replace auxiliary relay and fuse It does not run when Solenoid Valve Coil Failure gt m Replace solenoid coil and fuse operate Printed Circuit Board Short Circuitt P __ Conductive Foreign Particle _ __ Remove the particle and replace fuse Crankcase Heater Failure Measure resistance Replace oil heater and fuse Trans Coil Failure m Measure the transformer L Replace transformer secondary voltage Remote Control Wiring Incorrect Wiring Change wiring R S T phase of power source is phase Check the connection failure or reverse phase 05 alarm of R S and T phase Change to the c rr ct phase Remote Control Switch Failure Change over switch A Replace remote control switch of Printed Circuit Board is Local 40 alarm Check changeover switch Turn changeover switch on Remote EN Wiring Connection Failure Repair the wiring connection rinte E p M Check the current by tester _ _ _ _ _ oan Replace the Printed Circuit Board Failure Printed Cir
46. rmistor resistance Replace Thermistor Is resistance correct Check water flow rate Check the E temperature of Inlet and Outlet gt Check pump reverse rotation Check printed circuit board for Relay PCBp gt Check water strainer clogging E Check air mixing Check Chilled water thermostat setting value It shall be within the unit working range umm Leakage gt Bertin peer Eames o lt gt eee TROUBLESHOOTING EETA m 3 3 Activation of Freeze Protection Control This alarm code is indicated when the water inlet or outlet temperature is lower than 2 C Is connectors on the Printed ircuit Board correctly connected PCBc CN4 CN6 CN7 CN3 PCBp CN23Te2 Plug correctly and repair wiring Yes Pull out connector and measure thermistor resistance Replace Thermistor Is resistance correct Yes gt Check water flow rate Check the Yes temperature of Inlet and Outlet p Check pump reverse rotation Check printed circuit board gt Check water strainer clogging gt Check air mixing C Check Chilled water thermostat setting value It shall be within the working range 19 18 17 16 15 14 13 12 Thermistor i resistance KQ a 7 6 5 4 3 2 1 o 20 15 10 5 0 6 amp 10 15 20 25 30 35 40 45 55 60 Temperature C Thermistor for Water Tem
47. stance lt 179 kQ Is printed circuit board for relay PCBp connector CN23Te2 Plug Wiring Repair correctly connected Yes Disconnect connector and measure resistance Is the resistance correct Replace thermistor Yes Replace printed circuit board for relay PCBp 19 18 17 16 16 14 13 12 11 Thermistor resistance KQ ds 20 15 10 5 0 6 10 15 20 25 30 35 40 45 55 60 Temperature C Thermistor for Cooler Inlet Refrigerant characteristics TROUBLESHOOTING m L 23 L 5 2 3 Discharge Gas Temperature Thermistor Abnormality This alarm code is indicated when the thermistor resistance is out of range Refer below table Is connector CN24 Td on the Printed Circuit Board for Relay PCBp correctly connected Connect correctly Pull out connector and measure thermistor resistance Is resistance correct Replace thermistor Thermistor resistance KQ Air temperature C Thermistor for Discharge Gas Temperature characteristics 116 m L 24 5 24 Suction Gas Thermister Abnormality This alarm code is indicated when the thermistor resistance is out of range 72 Q lt Resistance lt 179 kQ
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