Service manual Function Indoor unit Operation ON/OFF by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance with the setting temperature. Anti-freezing control in cooling Prevent the water being freezed on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Tele Remote control (Optional)
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Service manual Outdoor unit Power relay control The unit has 3 mins delay between continuously ON/OFF operations. Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly. Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation.
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Service manual Model MSH-18CR Power supply Ph-V-Hz 1, 220-240V~, 50Hz Capacity Btu/h 18000 Input 1980 Cooling Rated current Btu/w.h 9.09 Capacity Btu/h Input Heating Rated current Max. input consumption 2100 Max. current 12.0 Starting current Model SHW33TC4-U Type Rotary 上海日立 Brand Capacity Btu/h...
Service manual Operation limits Cooling operation Outdoor unit air temp.℃ DB Indoor air temp. ℃ DB Note: The chart is the result from the continuous operation under constant air temperature conditions. However, excludes the initial pull-down stage. Heating operation Indoor air temp. ℃ DB Outdoor unit air temp.℃...
Service manual Installation details Wrench torque sheet for installation Outside diameter Torque inch Kg.m φ6.35 φ9.52 φ12.7 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit Pipe length and the elevation Max.
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Service manual In case that more than 5m. Caution: Capacity is base on standard length and maximum allowance length is base of reliability. Oil trap should be install per 5-7 meters.
Service manual Air purging of the piping and indoor unit Required tools: Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector. Note: The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Service manual Pumping down (Re-installation) Procedure 1. Confirm that both the 2-way and 3-way valves are set to the opened position. § Remove the valve stem caps and confirm that the valve stems are in the opened position. § Be sure to use a hexagonal wrench to operate the valve stems. 2.
Service manual Re-air purging (Re-installation) Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the closed position. 2. Connect the charge set and a charging cylinder to the service port of the 3-way valve. § Leave the valve on the charging cylinder closed. 3.
Service manual Balance refrigerant of the 2-way, 3-way valves Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the open position. 2. Connect the charge set to the 3-way valve’s service port. § Leave the valve on the charge set closed. §...
Service manual Evacuation Procedure: 1. Connect the vacuum pump to the charge set’s centre hose. 2. Evacuation for approximately one hour. § Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less]. 3.
Service manual Gas charging Procedure: 1. Connect the charge hose to the charging cylinder. § Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. 2. Purge the air from the charge hose. §...
Note: The pressure data is from 3 way valve, the pressure data are pressure above atmosphere. D: Dry bulb temp. W: Wet bulb temp. 9.1 MSH-07CR Cooling mode Outdoor temperature (Dry bulb temp) Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC 21ºC D15ºC W...
Service manual Heating mode OUTDOOR CONDITIONS 12ºC D 7ºC D 0ºC D -4ºC D -7ºC D -15ºC D Indoor Conditions Pressure 11ºC W 6ºC W -1ºC W -6ºC W -9ºC W -xºC W 15ºC Pressure( kg/cm ) 13.2 12.5 11.0 10.7 10.2 18ºC...
Service manual Troubleshooting 13.1 Display board Infrared Signal Receiver § Operation The indicator flashes once every second after power is on and illuminates when the air conditioner is in operation. § Timer indicator: The indicator illuminates then TIMER is set ON. §...
Service manual 13.4 Resetting phenomenon often occurs during operation (That is automatically entering to the status when power is on.) The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the following procedure: Resetting phenomenon often occurs during operation.
Service manual 13.7 Operation lamp off and Timer lamp flashes 13.8 Operation lamp on and Timer lamp flashes EEROM error, indoor PCB is defective. 13.9 Operation lamp flashes, Timer lamp flashes This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main control board must have fault.
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