Related Manuals for Mitsubishi Daiya SRK25GZ-l1
Summary of Contents for Mitsubishi Daiya SRK25GZ-l1
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Page 1: Wall Mounted Type
SRK-GZ SRK-GZ 1. WALL MOUNTED TYPE ROOM AIR-CONDITIONER Split system, Air to air heat pump type SRK25GZ-L1, SRK35GZ-L1, SRK502Z-L... -
Page 1: Wall Mounted Type
SRK-GZ SRK-GZ 1. WALL MOUNTED TYPE ROOM AIR-CONDITIONER Split system, Air to air heat pump type SRK25GZ-L1, SRK35GZ-L1, SRK502Z-L... -
Page 2: Table Of Contents
SRK-GZ CONTENTS GENERAL INFORMATION................ 3 1.1.1 Specific features ................. 3 1.1.2 How to read the model name ............. 3 SELECTION DATA ..................4 1.2.1 Specifications ..................4 1.2.2 Range of usage & limitations ............7 1.2.3 Exterior dimensions ................8 1.2.4 Piping system .................. -
Page 2: Table Of Contents
SRK-GZ CONTENTS GENERAL INFORMATION................ 3 1.1.1 Specific features ................. 3 1.1.2 How to read the model name ............. 3 SELECTION DATA ..................4 1.2.1 Specifications ..................4 1.2.2 Range of usage & limitations ............7 1.2.3 Exterior dimensions ................8 1.2.4 Piping system .................. -
Page 3: General Information
1.1.1 Specific features The “Mitsubishi Daiya” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with opera- tion control switch and the outdoor unit is composed of condensing unit with compressor. -
Page 3: General Information
1.1.1 Specific features The “Mitsubishi Daiya” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with opera- tion control switch and the outdoor unit is composed of condensing unit with compressor. -
Page 4: Selection Data
SRK-GZ SELECTION DATA 1.2.1 Specifications Model SRK25GZ-L1 (Indoor unit) SRC25GZ-L1 (Outdoor unit) Model SRK25GZ-L1 SRC25GZ-L1 Item Cooling capacity 2500 [900~2900] Heating capacity 3400 [900~4000] Power source 1 Phase, 220/240V, 50Hz Cooling input 0.96 [0.31~1.22] Running current (Cooling) Heating input 1.17 [0.28~1.35]... -
Page 4: Selection Data
SRK-GZ SELECTION DATA 1.2.1 Specifications Model SRK25GZ-L1 (Indoor unit) SRC25GZ-L1 (Outdoor unit) Model SRK25GZ-L1 SRC25GZ-L1 Item Cooling capacity 2500 [900~2900] Heating capacity 3400 [900~4000] Power source 1 Phase, 220/240V, 50Hz Cooling input 0.96 [0.31~1.22] Running current (Cooling) Heating input 1.17 [0.28~1.35]... - Page 5 SRK-GZ Model SRK35GZ-L1 (Indoor unit) SRC35GZ-L1 (Outdoor unit) Model SRK35GZ-L1 SRC35GZ-L1 Item Cooling capacity 3650 [900~3900] Heating capacity 4800 [900~6100] Power source 1 Phase, 220/240V, 50Hz Cooling input 1.24 [0.35~1.60] Running current (Cooling) Heating input 1.52 [0.35~2.10] Running current (Heating) Inrush current COP (Cooling) 2.94...
- Page 5 SRK-GZ Model SRK35GZ-L1 (Indoor unit) SRC35GZ-L1 (Outdoor unit) Model SRK35GZ-L1 SRC35GZ-L1 Item Cooling capacity 3650 [900~3900] Heating capacity 4800 [900~6100] Power source 1 Phase, 220/240V, 50Hz Cooling input 1.24 [0.35~1.60] Running current (Cooling) Heating input 1.52 [0.35~2.10] Running current (Heating) Inrush current COP (Cooling) 2.94...
- Page 6 SRK-GZ Model SRK502Z-L (Indoor unit) SRC502Z-L (Outdoor unit) Model SRK502Z-L SRC502Z-L Item Cooling capacity 5000 [900~5600] Heating capacity 6700 [900~7900] Power source 1 Phase, 220/240V, 50Hz Cooling input 2.22 [0.17~2.65] Running current (Cooling) 10.2 Heating input 2.50 [0.145~2.55] Running current (Heating) 11.5 Inrush current 11.5...
- Page 6 SRK-GZ Model SRK502Z-L (Indoor unit) SRC502Z-L (Outdoor unit) Model SRK502Z-L SRC502Z-L Item Cooling capacity 5000 [900~5600] Heating capacity 6700 [900~7900] Power source 1 Phase, 220/240V, 50Hz Cooling input 2.22 [0.17~2.65] Running current (Cooling) 10.2 Heating input 2.50 [0.145~2.55] Running current (Heating) 11.5 Inrush current 11.5...
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Page 7: Range Of Usage & Limitations
(2) Total one way piping length and vertical height difference. Model SRK25GZ-L1 SRK502Z-L Item SRK35GZ-L1 Total one way piping length (m) Outdoor unit is higher... -
Page 7: Range Of Usage & Limitations
(2) Total one way piping length and vertical height difference. Model SRK25GZ-L1 SRK502Z-L Item SRK35GZ-L1 Total one way piping length (m) Outdoor unit is higher... -
Page 8: Exterior Dimensions
SRK-GZ 1.2.3 Exterior dimensions (1) Indoor unit Unit: mm Model SRK25GZ-L1 Room temp. thermistor Piping hole right (left) Terminal block Remote controller 746.9 Piping for Gas ( 9.52) 370 Ø Piping for Liquid ( 6.35) 420 Ø Piping hole Piping hole Ø... -
Page 8: Exterior Dimensions
SRK-GZ 1.2.3 Exterior dimensions (1) Indoor unit Unit: mm Model SRK25GZ-L1 Room temp. thermistor Piping hole right (left) Terminal block Remote controller 746.9 Piping for Gas ( 9.52) 370 Ø Piping for Liquid ( 6.35) 420 Ø Piping hole Piping hole Ø... - Page 9 SRK-GZ Unit: mm Model SRK502Z-L Remote controller (2) Outdoor unit Model SRC25GZ-L1 Unit: mm 192.5 Drain holes 372.5 82.5 82.5 Terminal Ø block 61.5 33.3 127.7 Service valve (Liquid) Flare connecting 6.35 (1/4˝) Ø 40˚ 40˚ Service valve (Gas) Flare connecting 9.52 (3/8˝) Ø...
- Page 9 SRK-GZ Unit: mm Model SRK502Z-L Remote controller (2) Outdoor unit Model SRC25GZ-L1 Unit: mm 192.5 Drain holes 372.5 82.5 82.5 Terminal Ø block 61.5 33.3 127.7 Service valve (Liquid) Flare connecting 6.35 (1/4˝) Ø 40˚ 40˚ Service valve (Gas) Flare connecting 9.52 (3/8˝) Ø...
- Page 10 SRK-GZ Model SRC35GZ-L1 Unit : mm Drain holes MAX.80 Terminal block 45° 16 12 (Oval holes) 45° for unit fixing 2 places Drain holes Service Service Valve 142.5 142.5 Valve (Gas) (Liquid) Flare connecting Flare connecting Ø6.35 (1/4¨) Ø12.7 (1/2¨) Model SRC502Z-L Unit: mm...
- Page 10 SRK-GZ Model SRC35GZ-L1 Unit : mm Drain holes MAX.80 Terminal block 45° 16 12 (Oval holes) 45° for unit fixing 2 places Drain holes Service Service Valve 142.5 142.5 Valve (Gas) (Liquid) Flare connecting Flare connecting Ø6.35 (1/4¨) Ø12.7 (1/2¨) Model SRC502Z-L Unit: mm...
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Page 11: Piping System
SRK-GZ 1.2.4 Piping system Model SRK25GZ-L1 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. thermistor (Gas) Piping Check joint (Gas) ø9.52 4 way valve Accumulator Discharge temp. Room temp. Heat thermistor Heat thermistor... -
Page 11: Piping System
SRK-GZ 1.2.4 Piping system Model SRK25GZ-L1 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. thermistor (Gas) Piping Check joint (Gas) ø9.52 4 way valve Accumulator Discharge temp. Room temp. Heat thermistor Heat thermistor... -
Page 12: Electrical Data
SRK-GZ Model SRK502Z-L ELECTRICAL DATA 1.3.1 Electrical wiring Meaning of marks Symbol Parts name Symbol Parts name Symbol Parts name Capacitor for FMI Reactor Transformer Compressor motor Flap motor Varistor Fuse Room temp. thermistor 4 way valve (coil) Fan motor (Indoor) Heat exchanger thermistor (Indoor unit) Magnetic contactor Fan motor (Outdoor) -
Page 12: Electrical Data
SRK-GZ Model SRK502Z-L ELECTRICAL DATA 1.3.1 Electrical wiring Meaning of marks Symbol Parts name Symbol Parts name Symbol Parts name Capacitor for FMI Reactor Transformer Compressor motor Flap motor Varistor Fuse Room temp. thermistor 4 way valve (coil) Fan motor (Indoor) Heat exchanger thermistor (Indoor unit) Magnetic contactor Fan motor (Outdoor) - Page 13 SRK-GZ Model SRK25GZ-L1...
- Page 13 SRK-GZ Model SRK25GZ-L1...
- Page 14 SRK-GZ Model SRK35GZ-L1...
- Page 14 SRK-GZ Model SRK35GZ-L1...
- Page 15 SRK-GZ Model SRK502Z-L...
- Page 15 SRK-GZ Model SRK502Z-L...
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Page 16: Outline Of Operation Control By Microcomputer
¡ Above figure shows all indications for the purpose of explanation, but practically only the pertinent parts are indicated. Indoor unit indicator Model SRK25GZ-L1 RUN (HOT KEEP) lamp (green) ¡ Illuminates during operation. ¡ Flashes at stop blowing due to the hot keep. -
Page 16: Outline Of Operation Control By Microcomputer
¡ Above figure shows all indications for the purpose of explanation, but practically only the pertinent parts are indicated. Indoor unit indicator Model SRK25GZ-L1 RUN (HOT KEEP) lamp (green) ¡ Illuminates during operation. ¡ Flashes at stop blowing due to the hot keep. - Page 17 Illuminates during HI POWER operation. Illuminates during ECONOMY operation. (2) Back-up switch Model SRK25GZ-L1 When the remote controller become weak, or if the remote controller is lost or mal- functioning, this switch may be used to turn the unit on and off.
- Page 17 Illuminates during HI POWER operation. Illuminates during ECONOMY operation. (2) Back-up switch Model SRK25GZ-L1 When the remote controller become weak, or if the remote controller is lost or mal- functioning, this switch may be used to turn the unit on and off.
- Page 18 Control the flap by AIRFLOW button on the wireless remote control. (a) Natural flow (AUTO) The flap will be automatically set to the angle of air flow best to operation. Starting time of operation Models SRK25GZ-L1, 35GZ-L1 In case of heating operation In case of cooling...
- Page 18 Control the flap by AIRFLOW button on the wireless remote control. (a) Natural flow (AUTO) The flap will be automatically set to the angle of air flow best to operation. Starting time of operation Models SRK25GZ-L1, 35GZ-L1 In case of heating operation In case of cooling...
- Page 19 5 min. Setting time earlier earlier earlier (5) Outline of heating operation (a) Air flow selection Frequency of inverter changes within the range of selected air flow. Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Air flow selection Auto Frequency 34~110Hz 34~110Hz 14~150rps Air flow Depends on frequency.
- Page 19 5 min. Setting time earlier earlier earlier (5) Outline of heating operation (a) Air flow selection Frequency of inverter changes within the range of selected air flow. Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Air flow selection Auto Frequency 34~110Hz 34~110Hz 14~150rps Air flow Depends on frequency.
- Page 20 SRK-GZ (iii) Continuous mode operation (Temperature setting button on remote controller: Continuous) Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Item AUTO AUTO AUTO Inverter frequency 104Hz 98Hz 50Hz 98Hz 94Hz 58Hz 144rps 110rps 50rps Indoor fan 6th speed 5th speed 4th speed 7th speed...
- Page 20 SRK-GZ (iii) Continuous mode operation (Temperature setting button on remote controller: Continuous) Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Item AUTO AUTO AUTO Inverter frequency 104Hz 98Hz 50Hz 98Hz 94Hz 58Hz 144rps 110rps 50rps Indoor fan 6th speed 5th speed 4th speed 7th speed...
- Page 21 SRK-GZ (v) Defrosting operation S Models SRK25GZ-L1, 35GZ-L1 1) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) ¡ Model SRK25GZ-L1 After start of heating operation → When it elapsed 40 minutes. (Accumulated operation time) After end of defrosting operation →...
- Page 21 SRK-GZ (v) Defrosting operation S Models SRK25GZ-L1, 35GZ-L1 1) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.) ¡ Model SRK25GZ-L1 After start of heating operation → When it elapsed 40 minutes. (Accumulated operation time) After end of defrosting operation →...
- Page 22 Operation is maintained for 15 minutes with a higher blow out air temperature. ¡ Detail of operation Notes (1) When the hot keep fan speed and the fan speed Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L corresponding to the frequency command are Item not matched, the fan is operated with the fan speed whichever lower.
- Page 22 Operation is maintained for 15 minutes with a higher blow out air temperature. ¡ Detail of operation Notes (1) When the hot keep fan speed and the fan speed Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L corresponding to the frequency command are Item not matched, the fan is operated with the fan speed whichever lower.
- Page 23 SRK-GZ (6) Outline of cooling operation (a) Air capacity selection Frequency of inverter changes within the range of selected air flow. Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Air flow selection AUTO Frequency 34~92Hz 34~102Hz 18~118rps Air flow Depends on frequency. Frequency 34~92Hz...
- Page 23 SRK-GZ (6) Outline of cooling operation (a) Air capacity selection Frequency of inverter changes within the range of selected air flow. Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Air flow selection AUTO Frequency 34~92Hz 34~102Hz 18~118rps Air flow Depends on frequency. Frequency 34~92Hz...
- Page 24 SRK-GZ (b) Outline of control Cooling oriented dehumidifying S SRK25, 35GZ-L1 Room temperature is checked at 3-minute intervals after selecting the cooling or heating oriented dehumidifying in order to determine the operation range. Operation range –1 Hight Room temperature – Setting temperature (deg) Operating pattern D range C range...
- Page 24 SRK-GZ (b) Outline of control Cooling oriented dehumidifying S SRK25, 35GZ-L1 Room temperature is checked at 3-minute intervals after selecting the cooling or heating oriented dehumidifying in order to determine the operation range. Operation range –1 Hight Room temperature – Setting temperature (deg) Operating pattern D range C range...
- Page 25 3 min. 3 min. 3 min. Determination of heating oriented dehumidifying operation range Temperature check (iii) Continuous dehumidifying operation (Temperature setting button on remote controller: Continuous) Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Item Inverter frequency 36Hz 44Hz 40rps Indoor fan 2nd speed...
- Page 25 3 min. 3 min. 3 min. Determination of heating oriented dehumidifying operation range Temperature check (iii) Continuous dehumidifying operation (Temperature setting button on remote controller: Continuous) Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Item Inverter frequency 36Hz 44Hz 40rps Indoor fan 2nd speed...
- Page 26 SRK-GZ (9) Economical operation (ECONO button on remote controller: ON) Pressing the economy button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operates 1.5ºC higher than the setting temperature for the LO air flow during cooling or 2.5ºC lower than that during heating.
- Page 26 SRK-GZ (9) Economical operation (ECONO button on remote controller: ON) Pressing the economy button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operates 1.5ºC higher than the setting temperature for the LO air flow during cooling or 2.5ºC lower than that during heating.
- Page 27 (i) Operating conditions: When the unit is operating with the outdoor unit frequency other than 0 Hz(rps) or when the outdoor temperature sensor temperature rose beyond 41ºC for 2 minutes continuously. (ii) Detail of operation S SRK25GZ-L1 Indoor fan speed is raised forcibly by 1 step. However, the maximum speed is the 3rd speed. 10A current safe operation Taking the lower limit of control frequency at 34 Hz, if the output frequency obtained with the fuzzy calculation reaches this value, the operation changes to the thermostat operation.
- Page 27 (i) Operating conditions: When the unit is operating with the outdoor unit frequency other than 0 Hz(rps) or when the outdoor temperature sensor temperature rose beyond 41ºC for 2 minutes continuously. (ii) Detail of operation S SRK25GZ-L1 Indoor fan speed is raised forcibly by 1 step. However, the maximum speed is the 3rd speed. 10A current safe operation Taking the lower limit of control frequency at 34 Hz, if the output frequency obtained with the fuzzy calculation reaches this value, the operation changes to the thermostat operation.
- Page 28 0 Hz. [When 0 Hz is commanded from the indoor unit controller, when an outdoor protective function is actuated] (ii) Detail of operation S SRK25GZ-L1, 35GZ-L1 When stopped by indoor unit controller When stopped or reset by outdoor unit protective function...
- Page 28 0 Hz. [When 0 Hz is commanded from the indoor unit controller, when an outdoor protective function is actuated] (ii) Detail of operation S SRK25GZ-L1, 35GZ-L1 When stopped by indoor unit controller When stopped or reset by outdoor unit protective function...
- Page 29 SRK-GZ S SRK502Z-L When stopped by indoor unit controller When stopped or reset by outdoor unit protective function Function Operation Heating, heating Cooling, cooling Heating, heating Cooling, cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying 2 min. 2 min. 3 min.
- Page 29 SRK-GZ S SRK502Z-L When stopped by indoor unit controller When stopped or reset by outdoor unit protective function Function Operation Heating, heating Cooling, cooling Heating, heating Cooling, cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying 2 min. 2 min. 3 min.
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Page 30: Application Data
SRK-GZ APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section. -
Page 30: Application Data
SRK-GZ APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section. -
Page 31: Selection Of Location For Installation
(ii) Design the base higher than possible snow deposit. (3) Limitations for one way piping length and vertical height difference. Model SRK25GZ-L1 SRK502Z-L Item SRK35GZ-L1 One way piping length (R) 15 m 25 m... -
Page 31: Selection Of Location For Installation
(ii) Design the base higher than possible snow deposit. (3) Limitations for one way piping length and vertical height difference. Model SRK25GZ-L1 SRK502Z-L Item SRK35GZ-L1 One way piping length (R) 15 m 25 m... -
Page 32: Installation Of Indoor Unit
SRK-GZ 1.5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Lock for the inside wall structures (Intermediate support or pillar) and fairly install the unit after level surface has been Adjustment of the installation checked. -
Page 32: Installation Of Indoor Unit
SRK-GZ 1.5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Lock for the inside wall structures (Intermediate support or pillar) and fairly install the unit after level surface has been Adjustment of the installation checked. - Page 33 SRK-GZ (3) Preparation of indoor unit (a) Mounting of connecting wires S SRK25, 35GZ-L1 Remove lid Earth (ii) Remove cover, terminal block cover Wiring Terminal Connecting Wiring (iii) Insert connecting wire to terminal block securely. Terminal Block Wiring Clamp 1 Insert connecting wire up to the terminal block securely. If poor insertion of conductor may result in imperfect contact Terminal Block Cover between the conductor and the terminal causing heat genera-...
- Page 33 SRK-GZ (3) Preparation of indoor unit (a) Mounting of connecting wires S SRK25, 35GZ-L1 Remove lid Earth (ii) Remove cover, terminal block cover Wiring Terminal Connecting Wiring (iii) Insert connecting wire to terminal block securely. Terminal Block Wiring Clamp 1 Insert connecting wire up to the terminal block securely. If poor insertion of conductor may result in imperfect contact Terminal Block Cover between the conductor and the terminal causing heat genera-...
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Page 34: Installation Of Outdoor Unit
SRK-GZ ¡ When arranging the pipe through a hole opened at the cen- ter, open the knockout hole using nippers, etc. Chute Wall Note (1) It is designed to collect moisture ac- cumulated on the rear face in the drain pan. -
Page 34: Installation Of Outdoor Unit
SRK-GZ ¡ When arranging the pipe through a hole opened at the cen- ter, open the knockout hole using nippers, etc. Chute Wall Note (1) It is designed to collect moisture ac- cumulated on the rear face in the drain pan. -
Page 35: Refrigerant Piping
SRK-GZ 1.5.4 Refrigerant piping (1) Preparation Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them. Indoor unit side Outdoor unit side Dimension A Liquid side (φ6.35): 9-9.5 dia Press Gas side (Do not (φ9.52): 13.2-14 dia... -
Page 35: Refrigerant Piping
SRK-GZ 1.5.4 Refrigerant piping (1) Preparation Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them. Indoor unit side Outdoor unit side Dimension A Liquid side (φ6.35): 9-9.5 dia Press Gas side (Do not (φ9.52): 13.2-14 dia... -
Page 36: Test Run
It is very important to be careful of above when plugging in the unit to an already furnished electrical outlet. (4) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (5) Make sure that drain flows properly. (6) Standard operation data Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Item Cooling –... -
Page 36: Test Run
It is very important to be careful of above when plugging in the unit to an already furnished electrical outlet. (4) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (5) Make sure that drain flows properly. (6) Standard operation data Model SRK25GZ-L1 SRK35GZ-L1 SRK502Z-L Item Cooling –... -
Page 37: Precautions For Wireless Remote Controller Installation And Operation
SRK-GZ 1.5.6 Precautions for wireless remote controller installation and operation (1) Wireless remote controller covers the following distances: (a) When operating facing the air conditioner: Notes (1) The remote controller is correctly facing the sensing element of the air conditioner when being manipulated. -
Page 37: Precautions For Wireless Remote Controller Installation And Operation
SRK-GZ 1.5.6 Precautions for wireless remote controller installation and operation (1) Wireless remote controller covers the following distances: (a) When operating facing the air conditioner: Notes (1) The remote controller is correctly facing the sensing element of the air conditioner when being manipulated. -
Page 38: Maintenance Data
SRK-GZ MAINTENANCE DATA 1.6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct opera- tions as mis-operations. -
Page 38: Maintenance Data
SRK-GZ MAINTENANCE DATA 1.6.1 Trouble shooting (1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models] All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct opera- tions as mis-operations. - Page 39 SRK-GZ (2) Self diagnosis display on indoor unit...
- Page 39 SRK-GZ (2) Self diagnosis display on indoor unit...
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Page 40: Thermistor Error
SRK-GZ (3) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, Thermistor error connector poor connection] Is connector connection good? Correct connection. Is thermistor resistance value good? Replace thermistor. Replace PCB. Discharge pipe (Comp. dome) thermistor temperature char- Thermistor temperature characteristics acteristics (Room temperature, indoor unit heat ex- changer temperature, outdoor unit heat... -
Page 40: Thermistor Error
SRK-GZ (3) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, Thermistor error connector poor connection] Is connector connection good? Correct connection. Is thermistor resistance value good? Replace thermistor. Replace PCB. Discharge pipe (Comp. dome) thermistor temperature char- Thermistor temperature characteristics acteristics (Room temperature, indoor unit heat ex- changer temperature, outdoor unit heat... -
Page 41: Outdoor Unit Error
SRK-GZ [Broken power transistor Outdoor unit error broken compressor wire] Is output voltage applied to all 3 Defective inverter phases of power transistor? Is compressor wiring connected Connect securely. securely? Inspect compressor. [Overload operation, compressor Current safe stop lock, overcharge] Discharge refrigerant. -
Page 41: Outdoor Unit Error
SRK-GZ [Broken power transistor Outdoor unit error broken compressor wire] Is output voltage applied to all 3 Defective inverter phases of power transistor? Is compressor wiring connected Connect securely. securely? Inspect compressor. [Overload operation, compressor Current safe stop lock, overcharge] Discharge refrigerant. - Page 42 SRK-GZ [Wiring error including power cable, defective indoor/ Serial signal transmission error outdoor unit PCB, error on power supply system] Does error persist after power Trouble by transient cause, not unit trouble. reset? Is there any wrong connection on Correct improper wire connection on indoor/ outdoor unit.
- Page 42 SRK-GZ [Wiring error including power cable, defective indoor/ Serial signal transmission error outdoor unit PCB, error on power supply system] Does error persist after power Trouble by transient cause, not unit trouble. reset? Is there any wrong connection on Correct improper wire connection on indoor/ outdoor unit.
- Page 43 SRK-GZ (4) Phenomenon observed after shortcircuit, wire breakage on thermistor. (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Broken wire Cooling Release of continuous compressor operation command Continuous compressor operation command is not released. Room temperature thermistor Heating Continuous compressor operation command is not released. Release of continuous compressor operation command Continuous compressor operation command is not released.
- Page 43 SRK-GZ (4) Phenomenon observed after shortcircuit, wire breakage on thermistor. (a) Indoor unit Phenomenon Operation Sensor mode Shortcircuit Broken wire Cooling Release of continuous compressor operation command Continuous compressor operation command is not released. Room temperature thermistor Heating Continuous compressor operation command is not released. Release of continuous compressor operation command Continuous compressor operation command is not released.
- Page 44 SRK-GZ (6) Inspection procedures of indoor electrical equipment Replace fuse. Is fuse (3.15A) blown? Notes (1) Since the communication timing signal is transmitted only when the 52C is turned ON, check it under the operating condition. (2) Check the voltage on the terminal block. ¡...
- Page 44 SRK-GZ (6) Inspection procedures of indoor electrical equipment Replace fuse. Is fuse (3.15A) blown? Notes (1) Since the communication timing signal is transmitted only when the 52C is turned ON, check it under the operating condition. (2) Check the voltage on the terminal block. ¡...
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Page 48: Servicing
SRK-GZ 1.6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. -
Page 48: Servicing
SRK-GZ 1.6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. -
Page 49: Power Supply Remote Operation
(manufacturer: Matsushita, Manufac- ture type No.: MA165) to “Remote” part on the PCB in the direction as shown in the diagram below. This diagram shows SRK25GZ-L1 and although the other units have different layout on the PCB, their concepts are some. -
Page 49: Power Supply Remote Operation
(manufacturer: Matsushita, Manufac- ture type No.: MA165) to “Remote” part on the PCB in the direction as shown in the diagram below. This diagram shows SRK25GZ-L1 and although the other units have different layout on the PCB, their concepts are some. - Page 50 SRK-GZ MEMO...
- Page 50 SRK-GZ MEMO...
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