Mitsubishi Electric MSZ-GC22VA Manual de servicio

CONTENTS1. TECHNICAL CHANGES ····································22. PART NAMES AND FUNCTIONS······················23. SPECIFICATION··················

101. Coil frost preventionCoil frost prevention is as same as COOL mode. (9-1.1.)2. Low outside temperature operationLow outside temperature operation

11(3) PositioningTo confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the selectedangle.Confirm

12To change the airflow directionWhen to use this function?Use this function if you don’twant the air from the indoorunit to blow directl

13EMERGENCY OPERATION switch (E.O. SW)Operation mode COOL HEATSet temperature24:24:Fan speed Medium MediumHorizontal vane Auto AutoThe operation mode

1410TROUBLESHOOTING3. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate a

15Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

162. Indoor unit failure mode tableNOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (10-4.). 12-time flash2.5

17StartIndoor unit operates.Outdoor unit doesn'toperate.Indoor unit doesn't receive the signal from remote controller.OPERATION INDICATORla

18No.1256SymptomOperation indicator lampConditionCorrespondenceUpper lamp flashes.0.5-second ON0.5-second OFFMis-Wiringor serial signalOutdoorpowersys

1910-5. Trouble criterion of main partsMSZ-GC22VA MSZ-GC25VA MSZ-GC35VAMeasure the voltage power ON.FigureMeasure the resistance between the terminals

21TECHNICAL CHANGESMSZ-GA22VA -➔ MSZ-GC22VA -MSZ-GA25VA - ➔ MSZ-GC25VA -MSZ-GA35VA - ➔ MSZ-GC35VA -E1E1E1E1E1E11. Indoor model has been changed. PART

20Check of remote controller and indoor electronic control P.C. board BIndoor unit operates by pressing EMERGENCY OPERATION switch, but does not opera

21The unit does not operate with the remote controller.Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch.Check o

22How to check mis-wiring and serial signal errorDIs there rated voltage in the power supply?Is there any mis-wiring, poor contact, or wire disconnect

23Check of installation of the horizontal vaneEReplace the indoor electronic control P.C. board.Replace the interlock switch(Fan).Is the stopper of th

24Electromagnetic noise enters into TV sets or radiosFReplace or repair the antenna.Replace or repair the coaxial cable.NoNoNoYesYesNoNoYesYesYesIs th

25Room temperature thermistor (RT11)Indoor coil thermistor (RT12, RT13)Temperature (:)Resistance (k")MSZ-GC22VA MSZ-GC25VA MSZ-GC35VA1. Indoor po

2611DISASSEMBLY INSTRUCTIONS(1) Slide the sleeve and check if there is a locking lever or not.(2) The terminal with this connector has the lock

273. Remove the indoor power P.C. board, the indoor ter-minal P.C. board, and the electrical box(1) Turn the breaker OFF.(2) Remove the panel (Refer

OPERATING PROCEDURE PHOTOS4. Removing the vane motor(1) Turn the breaker OFF.(2) Remove the panel (Refer to 1) and the corner box.(3) Remove the indoo

3SPECIFICATION3FuseHorizontal vane motorVaristorTerminal block(F11)(MV)(NR11)(TB)T3.15AL 250V12V DCS10K320E3K1(ERZV14D471)3PSpecifications and rating

44NOISE CRITERIA CURVESMSZ-GC22VAMSZ-GC25VAINDOOR UNITWALLMICROPHONE0.8m1m90807060504030201063 125 250 500 1000 2000 4000 8000NC-60NC-50NC-40NC-30NC-2

5OUTLINES AND DIMENSIONS5Unit : mm745941.5214235253.518.5320335155 15521540.5254.55959 225 225229553 607 1288100137119PipingInsulation[35 O.DLiquid li

66WIRING DIAGRAMREFRIGERANT SYSTEM DIAGRAM7MSZ-GC22VAMSZ-GC25VAMSZ-GC35VARefrigerant flow in coolingRefrigerant flow in heatingIndoorheatexchangerFlar

7SERVICE FUNCTIONS88-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATIONA maximum of 4 indoor units with wireless remote controllers can be used in a

8NOTE :• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with theremote controller.• If main power

9MICROPROCESSOR CONTROL9Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF) button ON.Indoo