Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Wall Mounted
Series PKH
PKH18FL
[Models]
PKH24FL
PKH30FL
PKH36FL
CHECK
TEST
RUN
˚F
MODEL
˚C
SELECT
STOP
AMPM
FAN
SWING
START
NOT AVAILABLE
Revision:
The wrong descriptions in REFRIGERANT
SYSTEM DIAGRAM have been modified.
(Page 18.)
The wrong descriptions in WIRING DIAGRAM
have been modified.
(Page 19.)
Restrictor valve and capillary tube have been
added to "Specifications" of heat exchanger.
(Page 48.)
Please void OC276.
CONTENTS
1. FEATURES ·······························································2
2. PART NAMES AND FUNCTIONS ····························3
3. SPECIFICATIONS·····················································4
4. DATA ·········································································5
5. OUTLINES AND DIMENSIONS······························16
6. REFRIGERANT SYSTEM DIAGRAM ····················18
7. WIRING DIAGRAM ·················································19
8. OPERATION FLOW-CHART ··································20
9. MICROPROCESSOR CONTROL···························24
10. TROUBLESHOOTING ············································41
11. DISASSEMBLY PROCEDURE ·······························45
12. PARTS LIST ····························································48
C
US
No. OC276
REVISED EDITION-A
TM
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Related Manuals for Mitsubishi Electric Mr.Slim PKH18FL
Summary of Contents for Mitsubishi Electric Mr.Slim PKH18FL
- Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OC276 REVISED EDITION-A TECHNICAL & SERVICE MANUAL Wall Mounted Series PKH PKH18FL [Models] Revision: The wrong descriptions in REFRIGERANT PKH24FL SYSTEM DIAGRAM have been modified. (Page 18.) PKH30FL The wrong descriptions in WIRING DIAGRAM have been modified.
- Page 2 FEATURES CHECK TEST ˚F MODEL ˚C SELECT STOP AMPM SWING START NOT AVAILABLE Indoor unit Remote controller Models Cooling capacity / Heating capacity SEER PKH18FL 18,000 / 18,600 [25,100] Btu/h 11.1 PKH24FL 24,000 / 25,000 [31,500] Btu/h 10.2 PKH30FL 30,000 / 33,000 [40,500] Btu/h 10.6 PKH36FL 34,200 / 38,000 [45,500] Btu/h...
- Page 3 PART NAMES AND FUNCTIONS Wireless remote controller When cover is open. display CHECK TEST RUN CHECK&TEST RUN display indicates that the unit is being checked or test-run. display display MODEL SELECT Blinks when model is selected. Lights up while transmission to the indoor unit is mode using switches.
- Page 4 SPECIFICATIONS MODELS : PKH18FL, PKH24FL, PKH30FL, PKH36FL Model PKH18FL PKH24FL PKH30FL PKH36FL Item Cooling *1 Btu/h 18,000 24,000 30,000 34,200 Capacity Heating *1 Btu/h 18,600 [ 24,100/25,100 ] 25,000 [ 30,500/31,500 ] 33,000 [ 39,100/40,500 ] 38,000 [ 44,100/45,500 ] 10,700 [ 16,200/17,200 ] 14,700 [ 20,200/21,200 ] 19,000 [ 25,100/26,500 ]...
- Page 5 DATA MODELS : PKH18FL, PKH24FL, PKH30FL, PKH36FL 1. PERFORMANCE DATA 1) COOLING CAPACITY Outdoor intake air DB temperature ( ˚F ) Models Airflow Models ( CFM ) ( ˚F ) 21.0 14.4 1.56 20.2 13.9 1.69 19.4 13.3 1.84 18.5 12.7 1.99 17.6...
- Page 6 2) HEATING CAPACITY Auxiliary heater Outdoor intake air WB temperature ( ˚F ) Models 208V Models 230V Airflow ( ˚F ) (CFM) 12.1 1.20 14.1 1.34 16.3 1.49 18.7 1.65 21.4 1.83 23.7 1.99 PKH18FL 12.4 1.16 14.4 1.29 16.7 1.44 19.1 1.59...
- Page 7 2. PERFORMANCE CURVE NOTES : A point on the curve shows the reference point. <PKH18FL> COOLING CAPACITY HEATING CAPACITY SHF=0.82 Does not include booster heater (1.9kW) Indoor intake air WB temperature ( F) Indoor intake air DB temperature ( F) Indoor intake air DB temperature ( F) Indoor intake air WB temperature ( F) 65 (67) 75...
- Page 8 NOTES : A point on the curve shows the reference point. <PKH30FL> COOLING CAPACITY HEATING CAPACITY Does not include booster heater(2.2kW) SHF=0.75 indoor intake air DB temperature(°F) indoor intake air WB temperature(°F) indoor intake air DB temperature(°F) indoor intake air WB temperature(°F) 0 23 32 35 55 65 (67) 75 Outdoor intake air WB temperature(°F)
- Page 9 3. CONDENSING PRESSURE AND SUCTION PRESSURE Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PKH18FL> COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F) Indoor DB temperature( F) DB( F)
- Page 10 Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PKH24FL> COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F) Indoor DB temperature( F) DB( F) DB( F) Outdoor ambient temperature Outdoor ambient temperature...
- Page 11 Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PKH30FL> COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F) Indoor DB temperature( F) DB( F) DB( F) Outdoor ambient temperature Outdoor ambient temperature...
- Page 12 Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PKH36FL> COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F) Indoor DB temperature( F) DB( F) Outdoor ambient temperature DB( F) Outdoor ambient temperature...
- Page 13 4. STANDARD OPERATION DATA Models PKH18FL PKH24FL PKH30FL PKH36FL Item Unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Voltage 208/230 208/230 208/230 208/230 208/230 208/230 208/230 208/230 Frequency 1.79 1.56 2.36 2.37 3.12 3.02 3.44 3.54 Total input Indoor fan current 7.6/8.4 7.6/8.4 8.7/9.6...
- Page 14 5. OPERATING RANGE 1) POWER SUPPLY Min. Max. 198V 208V 230V 253V 1 Phase 60Hz 208/230V Guaranteed voltage range 2) OPERATION Air intake temperature Indoor Outdoor Function Condition DB ( ˚F ) WB ( ˚F ) DB ( ˚F ) WB ( ˚F ) Standard temperature Maximum temperature...
- Page 15 6. NOISE CRITERION CURVES Unit Ambient temperature 80˚F Wall Test conditions are based on JIS Z8731 3.3ft PKH18FL SPL(dB) LINE NOTCH PKH24FL 3.3ft NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz SPL(dB) LINE...
- Page 16 OUTLINES AND DIMENSIONS Indoor Unit Unit : inch PKH18FL PKH24FL...
- Page 17 PKH30FL Unit : inch PKH36FL...
- Page 18 Remote controller Unit : inch WIRELESS REMOTE CONTROLLER 2-9/32 CHECK TEST COOL ˚F MODEL ˚C SELECT STOP AMPM AUTO SWING START AMPM HEAT NOT AVAILABLE ON/OFF TEMP REFRIGERANT SYSTEM DIAGRAM PKH18FL Refrigerant pipe (option) PKH24FL {5/8" (with heat insulator) Flared connection Strainer Refrigerant flow HEATING...
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Page 19: Wiring Diagram
WIRING DIAGRAM MODELS PKH18FL, PKH24FL, PKH30FL, PKH36FL WIRING DIAGRAM POWER SUPPLY ~(1PHASE) AC208/230V 60Hz GRN/YLW (DC13.1V) (AC208/230V) GROUND CNSK(RED) CN2S (WHT) TRANS LED2 LED1 POWER POWER 1 3 5 CNDK (WHT) VANE (RED) (WHT) CN2D CN6V (WHT) (WHT) REMOTE CONTROLLER LED1 LED2 WIRELESS CN90... - Page 20 OPERATION FLOW-CHART MAIN OPERATION START Power circuit breaker Check SW ON twice Operation SW “OFF” timer Set time “ON” timer complete Set time complete Trouble Remote controller operation display STOP Trouble STOP Operating mode (COOL) COOL operation PROTECTION DEVICE PROTECTION DEVICE SELF HOLD RELEASE SELF HOLD Operating mode...
- Page 21 COOLING OPERATION COOL operation Four-way valve/OFF Initial COOLING Vane initial setting Vane 55 deg downward angle 70 deg downward angle Fan speed Downward discharge 1 hour Vane horizontal Vane setting notch airflow Compressor thermostat ON Allowance cancel 3-minute time delay 6-minute Allowance time delay...
- Page 22 DRY OPERATION operation Four-way valve / OFF Initial dry operation Vane Vane initial setting setting notch Room temperature is 64°F or lower During compressor ON 3-minute 3-minute compressor time delay operation Compressor & Compressor & thermostat thermostat ON 10-minute Compressor ON compressor time completes Compressor ON...
- Page 23 HEATING OPERATION Heat operation w 11 w 15 3-minute initial Heating area Auxiliary heater HEATING Defrost release Vane setting Vane initial Indoor coil Defrost setting notch thermistor is 140°F 30 min. elapse or higher defrosting Outdoor unit FAN speed trouble Low notch Four-way valve ON...
- Page 24 MICROPROCESSOR CONTROL 1.OUTLINE OF MICROPROCESSOR CONTROL Remote controller board OUTPUT to remote controller INPUT to remote controller Processes and transmits Indication LCD lights. OFF-ON switching. orders. COOL/DRY-AUTO-HEAT selector switching. Thermostat setting. TIMER mode selector-switching and Timer TEST CHECK COOL ˚F MODEL ˚C SELECT...
- Page 25 2. INDOOR UNIT CONTROL 2-1 COOL operation <How to operate> 1 Press POWER ON/OFF button. COOL 2 Press the MODE button to display COOL. ˚F 3 Press the TEMP( ) button to set the desired temperature. NOTE: Set temperature changes 2°F when the TEMP( ON/OFF TEMP button is pressed one time.
- Page 26 (1) Compressor control 1 3-minute time delay To prevent overload, the compressor will not start within 3 minutes after stop. 2 The compressor runs when room temperature is higher than set temperature. The compressor stops when room temperature is equal to or lower than the set temperature. The compressor maintains the previous state when the room temperature minus the set temperature is 0 degrees or more, or lower than 2 degrees.
- Page 27 (3) Auto vane control Auto vane position is set to 10 degrees airflow at the start-up of COOL operation. It can then be changed by the remote controller. (a) Vane position set mode & swing mode. ( i ) Every time AIR DISCHARGE button is pressed, setting will be changed . ( ii ) Airflow direction can be changed with AIR DISCHARGE button.
- Page 28 (4) Detecting abnormalities in the outdoor unit After the compressor has been continuously operated for 3 minutes, if the difference between the indoor coil temperature and room temperature is out of RANGE C for 1 minute, the indoor fan speed will turn to LOW. Five minutes later, if the dif- ference is still out of RANGE C,the outdoor unit is functioning abnormally.
- Page 29 2-2 DRY operation <How to operate> ˚F 1 Press POWER ON/OFF button. 2 Press the MODE button to display “DRY” 3 Press the TEMP( ) button to set the desired temperature. ON/OFF TEMP NOTE: The set temperature changes 2°F when the TEMP( button is pressed one time.
- Page 30 1) Compressor control 1 3-minute time delay To prevent overload, the compressor will not start within 3 minutes after stop. 2 The compressor runs when room temperature is higher than set temperature. The compressor stops when room temperature is equal to or lower than the set temperature. The compressor maintains the previous state when the room temperature minus the set temperature is 0°F or more, or lower than 2°F.
- Page 31 2-3 HEAT operation <How to operate> 1 Press POWER ON/OFF button. ˚F 2 Press the MODE button to display “HEAT” 3 Press the TEMP( ) button to set the desired temperature. HEAT NOTE: The set temperature changes 2°F when the TEMP( ON/OFF TEMP button is pressed one time.
- Page 32 (1) Compressor control 13-minute time delay To prevent overload, the compressor will not start within 3 minutes after stop. 2The compressor runs when the room temperature is lower than the set temperature. The compressor stops when the room temperature is equal to or higher than the set temperature. 3The compressor stops in check mode or during protective functions.
- Page 33 (5) Detecting abnormalities in the outdoor unit When the outdoor unit is determined to be abnormal by the following causes, the compressor will stop and the check code “ P8 ” will appear on the remote controller display. ( i ) During compressor ON while hot adjustment is set. 1 If the difference between the indoor coil temperature and room temperature is in the RANGE B, the indoor fan will stop.
- Page 34 2-4 AUTO operation (Automatic COOL/HEAT change over operation) <How to operate> ˚F 1 Press POWER ON/OFF button. AUTO 2 Press the MODE button to display “AUTO” ON/OFF TEMP 3 Press the TEMP( ) button to set the desired temperature. NOTE: The set temperature changes 2°F when the TEMP( button is pressed one time.
- Page 35 2-5 Auto vane control <How to operate> To change the air flow direction, press VANE ( ) button. ˚F AUTO SWING ON/OFF TEMP AUTO STOP MODE VANE AUTO START 30˚ 70˚ 10˚ 60˚ SWING CHECK LOUVER TEST RUN RESET CLOCK <Remote controller display>...
- Page 36 2-6 TIMER operation <Timer function> COOL AUTO STOP ·········The air conditioner stops after the set time lapses. ˚F STOP AUTO START ········The air conditioner starts after the set time lapses. SWING START AM AUTO OFF ············Timer is not active. ON/OFF TEMP <How to operate>...
- Page 37 (1) Indoor coil temperature code During the test run, the indoor coil temperature code from 1 to 15 is displayed on the remote controller instead of room temperature. The code should fall with the lapse of time in normal COOL operation, and should rise in normal HEAT operation.
- Page 38 2-9 Dip switch and jumper connector functions. Each figure shows the initial factory setting. 2-9-1 On remote controller board (1). On indoor controller board 1. SW1 (Mode selector) 1 2 3 4 5 6 7 8 9 10 SW1-1) Switch that changes between FAN mode and AUTO mode OFF:AUTO mode for models with heat pump ON:Fan mode for models without heat pump SW1-2) Switch for drain pump...
- Page 39 5. SW6 (Address selector) 1 2 3 4 This switch is not available for series PKH. 6. SW7 (Model selector) Switch to set the output of phase-controlled indoor fan motor. Address setting is available at any time. The initial factory setting by is based on each capacity. Service Ref.
- Page 40 2-11 Wireless remote controller pair number setting operation 1 Turn on the main power to the unit. 2 Press the SET button with the point of a ball-point pen or the like. Start this operation from the status of remote controller display turned off. blinks and Model No.
- Page 41 TROUBLESHOOTING 1. Self-diagnostic function Self-check 1 Turn on the main power to the unit. CHECK 2 Press the button twice continuously. (Start this operation from the status of remote controller display turned off.) begins to light. CHECK B “00” begins to blink. 3 While pointing the remote controller toward the unit’s receiver, press the button.
- Page 42 2. OTHER TROUBLES AND CAUSES Auto vanes do not work. Auto vane motor is damaged. Auto vane motor does not work. Auto vane motor relay is damaged. Connector is poorly connected. Auto vane motor is poorly assembled. Indoor controller board is damaged. Unit stops after 5 to Protection function is working.
- Page 43 3. WRONG WIRING ON SITE 3-1 Between remote controller and indoor unit If the wire is disconnected between the remote controller and the indoor unit, nothing is displayed on the remote controller when the POWER button is pressed. The beep sound will also not be heard. 3-2 Phenomenon due to wrong wiring between indoor and outdoor units Wrong wiring Mode...
- Page 44 4. HOW TO CHECK THE PARTS Parts name Check points Room temperature Disconnect the connector, then measure the resistance using a tester. thermistor (RT1) (Surrounding temperature 50°F to 86°F) Pipe temperature thermistor (RT2) Normal Abnormal (Refer to the thermistor) 4.3k to 9.6k Open or short Fan motor (MF)
- Page 45 DISASSEMBLY PROCEDURE Indoor unit PKH24FL OPERATING PROCEDURE PHOTOS&ILLUSTRATION 1. Removing the lower side of the indoor unit from the instal- lation plate Figure 1 (1) Remove the 2 screws. Hanger of indoor unit Hang the indoor unit hangers to the catches on the instal- lation plate.
- Page 46 OPERATING PROCEDURE PHOTOS&ILLUSTRATION (8) Remove the screws of the indoor controller board case, Relay Photo 3 and pull out the indoor controller board case. Then the transformer and the capacitor and relay can be serviced. Capacitor Power board Indoor controller board case Electrical box 5.
- Page 47 OPERATING PROCEDURE PHOTOS 8. Removing the line flow fan and the fan motor Photo 7 (1) Remove the left and right side panels. Screw Line flow fan (2) Remove the grilles. (3) Remove the electrical box. Fan motor (4) Remove the drain pan. (5) Loosen the screw that fixes the line flow fan to the fan motor.
- Page 48 PARTS LIST ELECTRICAL PARTS PKH18FL PKH24FL PKH30FL 32·33 PKH36FL 12 13 16 17 Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram (Drawing No.) Symbol R01 005 103 SLEEVE BEARING R01 Z61 102 BEARING MOUNT R01 12G 114 LEFT LINE FLOW FAN R01 16G 114 LEFT LINE FLOW FAN...
- Page 49 Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram (Drawing No.) Symbol T7W E13 529 DRAIN PAN T7W E14 529 DRAIN PAN R01 12G 621 CENTER COVER JOINT SHAFT R01 12G 063 AUTO VANE R01 12G 002 AUTO VANE R01 16G 002 DRAIN HOSE R01 KV5 527...
- Page 50 STRUCTURAL PARTS PKH18FL PKH24FL PKH30FL PKH36FL Part number that is circled is not shown in the figure. Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram (Drawing No.) Symbol R01 12G 662 LEFT SIDE PANEL R01 E01 812 UNDER PLATE R01 E00 812 UNDER PLATE...
- Page 52 2001 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Nov. 2003 No.OC276 REVISED EDITON-A PDF 9 Distributed in Dec. 2001 No.OC276 New publication, effective Nov. 2003 Specifications subject to change without notice.
- Page 53 3400 Lawrenceville Suwanee Road Suwanee, Georgia 30024 ● Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904 ● www.mrslim.com Specifications are subject to change without notice.