Mitsubishi SKM28ZA- Manuals

196 (3) Operation data ¡ The combinations of the indoor units is indicated by numbers. They are read as follows. (Example) SKM22ZA / 22 SKM40ZA / 40 ¡ The capacity of the indoor units is shown by rooms. If this exceeds the maximum capacity of the outdoor unit, the demand capacity will be proportiona...

197 (b) Cooling Indoor unit combination Cooling capacity (kW) Power consumption (W) Running current (A) Room cooling capacity (kW) Total capacity (kW) A room 2.2 2.5 2.8 3.2 4.0 2.2 2.1 2.0 1.9 1.7 2.25 2.2 2.1 1.8 2.2 2.4 2.6 2.8 3.1 2.25 2.4 2.6 3.0 B room Min. Standard Max. Min. Standard Standard...

198 6.2.2 Range of usage & limitations Indoor intake air temperature(Upper, lower limits) Indoor unitsthat can beused incombination Length for one indoor unit Total length for all rooms Max. 25m Max. 30m 6.5kW 1 to 2 units SCM45ZA Refer to the selection chart. Compressorstop/startfrequency Power...

199 6.2.3 Exterior dimensions (1) Indoor unitModels SKM22ZA, 25ZA A 750 75 92 40 60 746.9 7.5 62 62 7.5 16 VIEW A 65 615 150 450 150 Room temp. thermistor Terminal block Piping for Gas ( Ø 9.52) 370 Piping for Liquid ( Ø 6.35) 420 Piping hole ( Ø 65) Piping hole ( Ø 65) Piping hole right (left) 178 ...

200 Models SKM32ZA, 40ZA A 790 15 67 51 60 62 18 16 780 VIEW A 15 760 170 450 170 Room temp. thermistor Terminal block Piping for Gas ( Ø 12.7) 390 Piping for Liquid ( Ø 6.35) 440 Drain hose 600 ( Ø 16) Piping hole ( Ø 65) Piping hole ( Ø 65) Piping hole right (left) Unit: mm 174 3 275 187.5 61 46 9...

201 6.2.4 Piping system Model SCM45ZA Outdoor unit Indoor unit Thermistor(Th I -R) Thermistor(Th I -A) Check joint Thermistor(Th O -D) Thermistor(Th O -A) Thermistor(Th O -R) Heat exchanger Heat exchanger Liquid line Gas line (ø6.35) (ø6.35) (ø9.52) (ø9.52) Strainer Suction Accumulator Compressor Di...

202 6.2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (1) Coefficient of cooling and h...

203 RD WH BK J R F (250V · 3.15A) Power line(Outdoor unit) Black Blue Gray Yellow Red White Purple Yellow/Green BK BL GR Y RD WH PP Y/GN Color symbol S ZNR CF I CNC CNB TR FM I Q CNM CNE CND CNG Display WirelessR-Amp Back upswitch Printed circuit board Th I- A Th I- R FM I SM COM CNU CF BL RD RD BK ...

205 FAN SPEED ON/OFF MODE TEMP AIR FLOW SET TIMER TIMER ACL HI POWER ECONO CONT HI POWER ECONO ON OFF TIMER AUTO HI MED LO FAN SPEED indicator Indicators the ¡ for the fan speed which has been set. ON-TIMER • OFF-TIMER indicator FAN SPEED button Each time the button is pushed, the ¡ indicator is swi...

206 (3) Back-up switch When the remote controller become weak, or if the remote controller is lost or malfunctioning, this switch may be used to turn the unit on and off. (a) Operation Push the switch once to place the unit in the automatic mode. Push it once more to turn the unit off. (b) Detail of...

207 (5) Comfort timer setting If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation is selected, the comfort timer starts and determines the starting time of next operation based on the initial value of 15 minute...

209 (d) Hot keep operation If the hot keep operation is selected during the heating operation, the indoor fan is controlled based on the temperature of the indoor unit heat exchanger (detected with Th I -R, indoor unit heat exchanger thermistor) to prevent blowing of cool wind. ¡ Normal mode (Normal...

210 3) Operation of function component in defrosting 4) Conditions for finishing defrosting When any of the following conditions is met, the defrosting finishing operation will start. 1 When the temperature of the outdoor heat exchanger thermistor (Tho-R) is 9 ° C or more. 2 When 10 minutes has pass...

212 (e) High pressure cut protection control The high pressure cut protection operates during heating operations when a “heating 0 rps” serial signal is received from one of the two operating indoor units. 1 When only one of two operating units sends a “heating 0 rps”signal. 2 min. 0 rps instruction...

214 (l) Compressor lock If the motor for the compressor does not turn a half a turn approximately 0.3 seconds after it has been started, it is determined that a compressor lock has occurred and the inverter is stopped. (m) Compressor dome thermistor broken wire protection control 1) When the outdoor...

215 6.5 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 ...

216 6.5.1 Installation of indoor unit (a) Caution for installation 1) The system should be applied to places as households, residences and the like. 2) The equipment shall be installed in accordance with national wiring regulations. 3) The connection to the fixed wiring of the mains supply must be m...

217 3) Mounting of interconnecting wires (Field wiring) a) Remove the lid. b) Remove the terminal block cover. c) Connect the connection wire securely to the terminal block. Cautions when piping from the left and the rear center of the unit Earth terminal Terminal block Wiring clamp Cover Lid Pipe D...

218 Drainage Too high It curves like a wave. under 5 cm Smell fromsewerage drains. The end of the drain hose is touching the water. The gap to the ground is less than 5 cm. The end of the drain hose is touching the sewage drains. Drain hose Extension drain hose when a part of the extension drain hos...

219 Air inlet Servicespace ( ) Air inlet AirOutlet Note (1) If the wall is higher than 1.2 m or a ceiling is present, distances larger than indicated in the abovetable must be provided. 300 Air inlet Air inlet Air inlet AirOutlet AirOutlet AirOutlet 80 mm or more 180 mm or more 75 mm or more 80 mm o...

220 6.5.4 Electrical wiring Power source UNIT A 1 2 1 2 3 1 2 3 UNIT B UNIT A UNIT B 1 2 3 1 2 3 Out side In side Earthleakagebreaker Circuitbreaker Power source 1 2 Earthleakagebreaker Circuitbreaker [POWER SUPPLY CODE] CENELEC code for cables required field cables. H05RNR3G 4.0 (e) After connectin...

221 * If the total length for all the rooms exceeds the length of chargeless refrigerant pipe, additionally charge with refrigerant according the item 4. ¡ The diameter of the refrigerant pipe: ¡ Outdoor unit and the total connectable indoor units (class kW): Liquid side Gas side 2.2 · 2.5 · 2.8kW ø...

222 (3) Air purging (a) Remove the cap on both gas and liquid sides before starting operation. (b) After completing the operation, do not forget to tighten the cap (gas may leak). (c) Conduct air purging for all connected indoor units. (2) Connection Indoor Outdoor ¡ Secure the nut with a specified ...

224 6.6 MAINTENANCE DATA 6.6.1 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 ...

225 Indoor unit indicator RUN lamp 1 time flash 2 time flash 6 time flash Keeps flashing Keeps flashing Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on Comes on 1 time flash 2 time flash 1 time flash 2 time flash 2 time flash 3 time flash 5 time flash 6 time...

226 (3) Inspection procedures corresponding to detail of trouble Thermistor error [Broken thermistor wire,connector poor connection] Is connector connection good? YES YES NO NO Replace PCB. Is thermistor resistance value good? Correct connection. Replace thermistor. 30 25 20 15 10 5 30 20 10 40 50 6...

227 Outdoor unit e rror [Broken power transistor,broken compressor wire] Is output voltage applied to all 3phases of power transistor? YES YES NO NO Inspect compressor. (Broken coilwire) Is compressor wiring connectedsecurely? Connect securely. Current safe stop [Overload operation, compressorlock, ...

229 (4) Phenomenon observed after shortcircuit, wire breakage on thermistors. (a) Indoor unit Phenomenon Thermistor Shortcircuit Broken wire Cooling Release of continuous compressor operation command Heating Continuous compressor operation command is not released. Cooling System can be operated norm...

230 (6) Indoor electrical components inspection flowchart Is there voltage between terminal blocks 1 and 2 ? (AC 220/240 V) Indoor electrical components are normal. Is there voltage between CNC (1) and (2) on the secondary side of the transformer? (Approx. 12 V) Is the voltage between terminal block...

231 (7) Outdoor unit inspection points ◆ Inspection of resistance value of Comp. dome thermistor Remove the connector and check the resistance value.See the section of thermistor characteristics on page 226. ◆ Inspection of reactor conductivity Remove the connector and check forconductivity.It must ...

232 Liquid side Gas side Check joint Service hose Charge hose Vacuumpump Refrigerantcylinder Gaugemanifold 6.6.2 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 refri...