Mitsubishi MSC-GA20VB Wartungshandbuch

SPLIT-TYPE, AIR CONDITIONERSSPLIT-TYPE, HEAT PUMP AIR CONDITIONERSCONTENTS1. TECHNICAL CHANGES ····································32. PART NAMES AND

10NOTE• The operation settings are memorized when 10 seconds have passed after the remote controller was operated.• If main power is cut while AUTO ST

11TROUBLESHOOTING93. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an

129-2. Instruction of troubleshootingStartIndoor unit operates.Outdoor unit doesn't operate.Indoor unit doesn't receive the signal from rem

139-3. Troubleshooting check table Operation Indicator· Flashing of the OPERATION INDICATOR lamp (on the left-hand side) indicates possible abnormalit

14AACheck of indoor fan motorIs soldered point of the connector correctly soldered?Is resistance 0 (short circuit) or ∞ (open circuit)?Yes ( 0 or ∞ )Y

15BBCheck of remote controller and receiver P.C. boardIndoor unit operates by pressing the EMERGENCY OPERATION switch, but doesn’t operate with the re

16DDHow to check mis-wiring and serial signal errorSerial signal error is indicated.(0.5-sec. ON, 0.5-sec. OFF)1. Turn OFF the power supply(indoor / o

17MSC-GA20VBMSC-GA25VBMSC-GA35VBIndoor electronic control P.C. boardCN302Indoor coil thermistor (RT12)Room temperature thermistor (RT11)Temperature (:

18DISASSEMBLY INSTRUCTIONS10MSC-GA20VB MSC-GA25VB MSC-GA35VB (1) Slide the sleeve and check if there is a locking lever or not.(2) The terminal

19OPERATING PROCEDUREPHOTOS3. Removing the electrical box(1) Remove the front panel. (Refer to 1.)(2) Remove the electrical cover. (Refer to 2.)(3) Re

2Revision B:• Indoor heat exchanger of MSC-GA35VB - has been changed. E1Revision A:• RoHS PARTS LIST has been added. OB385B.qxp 07.5.21 4:41 PM Page

20PARTS LIST (non-RoHS compliant)1112345678E02 763 234E02 764 234E02 959 000E02 763 067E02 959 010E02 408 142E02 763 100E02 764 100E02 763 975E0

21Part No.No.Part Name202122INDOOR HEAT EXCHANGERINDOOR HEAT EXCHANGERUNION(GAS)UNION(GAS)UNION(LIQUID)111111{9.52{9.52{6.35111E02 001 504E02 661 702E

22ROHS PARTS LIST (RoHS compliant)1212345678GGGGGGGGGGGGGE12 763 234E12 764 234E12 959 000E12 763 067E12 959 010E12 408 142E12 763 100E12 764 100E

23Part No.No.RoHSPart Name202122GGGGINDOOR HEAT EXCHANGERINDOOR HEAT EXCHANGERUNION(GAS)UNION(LIQUID)111111{9.52{6.35111E12 001 504E12 897 702E12 A59

OPTIONAL PARTS13CCCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in May 2007. No.OB385 REVISED EDITION-B 6Distributed in May 2006.

3PART NAMES AND FUNCTIONS2MSC-GA20VB MSC-GA25VB MSC-GA35VBEmergency operation switchFanCatechin air filter(With deodorizer)Air outletVertical

4ACCESSORIESMSC-GA20VBMSC-GA25VBMSC-GA35VBInstallation plateInstallation plate fixing screw 4 o 25 mmRemote controller holderFixing screw for 3 3.5 o

5SPECIFICATION3Indoor modelFunctionIndoor unit power supplyAir flow(High/Med. /Low )Power outletRunning currentPower inputPower factorFan motor curren

6OUTLINES AND DIMENSIONS5MSC-GA20VB MSC-GA25VB 244242 57 or more901103014960627860815783Power supply cordLead to right 1.0mLead to left 0.3mAir outIns

7MSC-GA35VB 244242218.525881.581.541422.517.5161.5161.532632657 or more901103014960627860815783Power supply cordLead to right 1.0mLead to left 0.3mAi

REFRIGERANT SYSTEM DIAGRAM87SERVICE FUNCTIONS88-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATIONA maximum of 4 indoor units with wireless remote co

9The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.After modification, press