Mitsubishi Mr. Slim PCH24EK- Manuals

OC247A-15 9 REFRIGERANT SYSTEM DIAGRAM Outdoor unit Refrigerant pipe(Option) 5/8 (with heat insulator) Outdoorheatexchanger Refrigerant pipe(Option) 3/8 (with heat insulator) Flexible tube Flared connection Ball valve Fusibleplug HighPressureSwitch Outdoor coilthermistorTH3 Ball valve Flow of refrig...

OC274-27 Minimum 3 minutes 1 ON Thermostat Indoor fan Auto vane Compressor ON LOW or HIGH Initially 10 ° (Changeable by remote controller setting) LOW or HIGH ON OFF OFF CLOSE CLOSE OFF Operation starts byO N / O F F b u t t o nON. Operation stops byO N / O F F b u t t o nOFF. The room temperature d...

OC274-29 (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 remotecontroller. (a) Vane position set mode & swing mode.( ! ) Every time AIR DISCHARGE button is pressed, setting will be change. ( @ ) Airflow direct...

OC274-30 (4) Detecting abnormalities in the outdoor unit After the compressor has been continuously operated for 3 minutes, if the difference between the indoor coil temperatureand room temperature is out of RANGE C for 1 minute, the indoor fan speed will turn to low. Five minutes later, if the diff...

OC274-38 11 TROUBLESHOOTING 1. TROUBLE IN TEST RUN The display “CENTRALLYCONTROLLED” on remotecontroller does not disap-pear. 1) Wrong address setting of remote con- troller/indoor controller board. 2) Timer adapter is connected to the remote controller. 3) Signal transmission error between indoor u...

OC274-42 vanes do not work. Vane motor does not work.Limit switch does not work.Connector is poorly connected.Vane motor is poorly assembled.Indoor controller board is damaged. Unit stops after 5 to20 seconds operation Protection function is working. Air discharge displayis OFF and air dis-charge bu...

OC274-43 5. HOW TO CHECK THE PARTS Room temperaturethermistor (RT1)Pipe temperaturethermistor (RT2) Fan motor (MF) Disconnect the connector, then measure the resistance using a tester.(Surrounding temperature 50°F to 86°F) Measure the resistance between the terminals using a tester.(Surrounding temp...

OC246-37 4. How to check the parts PL12AK/PL18AK/PL24AK/PL30AK/PL36AK/PL42AK Parts name Check points Disconnect the connector then measure the resistance using a tester. (Surrounding temperature 50 - F~86 - F) Measure the resistance between the terminals using a tester. (Surrounding temperature 68 -...

OC278-39 5. How to check the parts Parts name Check points Disconnect the connector then measure the resistance using a tester.(Ambient temperature 50 ° F to 86 ° F) Measure the resistance between the terminals using a tester.(Ambient temperature 77 ° F) Vane motor (MV) (Refer to the thermistor) Roo...

OC247A-16 10 MICROPROCESSOR CONTROL OUTDOOR MICROPROCESSOR CONTROL 1. Protection function (1) As soon as a reversed phase, an open phase, or a P. C. board trouble is sensed, the operation stops and the check code is displayed by LED on the outdoor controller board. (2) When a protection function suc...

OC247A-17 6. Fixed fan-output While the compressor is operating and the fan output step is indicated by LED, pushing SW2 fixes the fan output of that time.The fixed fan-output can be released when either of the following conditions is satisfied. 1 SW2 is pushed again. 2 SW3 setting is changed. 3 The...

OC247A-19 1-1 Outdoor coil temperature To obtain data on the outdoor coil temperature,add the number of bits of lighting LEDs, andsee the graph to find the temperature. 1-2 Fan output step To obtain data on the fan output step, add the number of bits of lighting LEDs, and see the graph below to find...

OC247A-21 4. WRONG WIRING ON SITE 4-1 Between remote controller and indoor unit If wire is disconnected between the remote controller and the indoor unit, the POWER ON display does not appear despiteturning the power switch ON. The beep sound is not heard, either. 4-2 Phenomena due to wrong wiring b...