Improper installation may cause the unit to tip over and cause personal injury or damage to the unit. Insufficient power supply capacity or improper installation of the unit may cause unit malfunction, electric shock, or fire.
3] Sound pressure levels
Sound pressure level Ceiling concealed
NC curves
4] Fan performance and corrected air flow
5] Outlines and Dimensions
6] Wiring Diagram
SW3 switch (for mode selection) TH21 Thermistor (inlet air temperature detection) SW4 switch (for model selection) TH22 Thermistor (pipe temp. detection/fluid) SW5 switch (for mode selection) TH23 Thermistor (temperature of pipeline/gas detection) . 2 To perform a drain test for the drain pump, turn on SWE on the control board while the indoor unit is turning on.
7] Refrigerant system diagram
8] Troubleshooting
Check methods
Error Code Lists
The last digit in the 4000 and 5000 check fault codes and the two-digit detail codes indicate whether the codes apply to the compressor converter and the fan converter. Code 4225 (Detail Code 108): Bus Voltage Drop in Fan Converter System. Code 4230: Protection against overheating of the cooler in the compressor converter system.
Error Code
Cause, check method and remedy (1) Faulty wiring
Cause, check method and remedy
One hour after the preliminary water leak was detected, it does not register that the drain pump goes from OFF to ON. Drain pump operation triggered by liquid level sensor immersion (except during cooling/drying mode). The conditions listed under points 1) to 3) above are always met before the criteria for forced stop of the outdoor unit.
Perform a power reset for the indoor unit identified as the fault source and the outdoor unit connected to the same refrigeration circuit. Forced stop of the outdoor unit cannot be canceled by stopping the unit via the remote controller. The address and attribute appearing on the remote controller are those of the indoor unit that caused the error.
When it is detected that the float switch has been off for 15 seconds, it is interpreted that the sensor tip is not immersed in water. The total time it takes to detect this error is 3 minutes and 15 seconds, including the time it takes to detect the first dip of the sensor tip. The float switch detects that the sensor tip has been submerged in water for 15 minutes or more.
Error definition and error detection method
If it is detected less than 180 rpm or more than 2000 rpm, the indoor unit will restart and continue to run for 3 minutes. If detected again, the display will appear. Check whether the device stops immediately when the detection result is abnormal or power failure occurs. Check the voltage at CNVDC (between pins 1 and 3(+)) of the INV board while the inverter is stopped, and if it is less than 220V, check the following points.
Check that the resistance between pins 1 and 3 (home side) of the CNACL connector is not infinite ( ). 4) Check the diode bridge (DB01) for problem. Confirm that DC12V is applied to the connector CNXB2 (between pins 4 and 5(+)) on the indoor controller board while the inverter is operating. If the unit stops within 10 seconds of resuming operation and the same error is detected, replace the NF board.
Cause, check method and remedy (1) Different voltage connection
Error definition and error detection method H/W error
Cause, Check method and remedy
Error definition and error detection method IPM error signal is detected
When IPM/IGBT short damage or grounding is detected on the load side just before switching on the inverter. Return air temperature sensor (TH21) error (Indoor unit) Return air temperature sensor (TH4) error (OA processing unit). Pipe temperature sensor (TH22) error (Indoor unit) Pipe temperature sensor (TH2) error (OA processing unit).
If a short circuit or an open is detected during thermostat ON, the outdoor unit switches to anti-restart mode for 3 minutes. When a short or an open of THHS is detected just before or during the inverter operation. When abnormal value is detected by the ACCT detection circuit immediately before the inverter starts 3.
Detection of the disconnected float switch (open-phase condition) during operation 3. Cause, check method and remedy. The address and attribute displayed on the remote indicates the controller that detected the error. The address/attribute shown on the remote control display indicates the controller where an error occurred.
Cause
Check method and remedy
Generated error when the command cannot be sent for 4-10 minutes in a row due to bus busy. Generated error when the command cannot be sent to the transmission line for 4-10 minutes in a row due to noise. The address/attribute that appears on the remote control display indicates which controller has an error. Communication error between the main microcomputer on the indoor unit board and the transmission microcomputer. The address/attribute that appeared on the remote control display indicates which controller has encountered an error.
Turn off the power source of the outdoor and indoor units. (When the power source is turned off separately, the microcomputer will not be reset and the error will not be corrected.). The error is detected when no confirmation (ACK signal) is received after the transmission. eg. When the data is transmitted six times in a row at 30 second intervals, the error is registered on the transmission side.).
The address/attribute that appears on the remote control display indicates which controller did not respond (ACK).
System configuration (1) System with one outdoor unit
System configuration
The address/attribute shown on the remote control display indicates the controller that did not respond (ACK). 2) Grouping of units in a system with several outdoor units. The address/attribute shown on the remote control display indicates the controller that did not respond (ACK). 3) System connected to the system controllers (MELANS). Address that should not exist. the remote controller has been changed, after the group is set with the ME remote controller, the indoor unit retains the memory of the previous address.
Delete unnecessary address information using the ME remote's manual setting function. Note that the above method will delete all group settings set via the ME remote control and all interlock settings between LOSSNAY units and indoor units.
Error source, cause, check method and remedy
DC fan motor (fan motor/INV board)
If the problem described on the left occurs at first power-up, replace the INV board. The fault is detected 30 seconds after start-up (LED2 on the INV board lights up) and the units stop. If the fan motor is not locked, go to item [4]. If no problem is found with item [4], replace the INV board.
Error code:4255. a) Replace the INV board. b)If the problem persists after replacing the INV board, replace the fan motor. 5% or 5V. a)If a voltage imbalance is detected, go to item [4]. b)If no problems are found with item [4], replace the INV board. c)If the problem persists after replacing the INV board, replace the fan motor. [4]Check the fan motor for ground fault and check the coil for problems. Disconnect the fan motor wiring from the indoor unit and check the resistance and wirewound resistance of the fan motor.
Turn off the power, take the following components from the control box, and then check the components. When checking for refrigerant leakage from the indoor LEV, run the target indoor unit in fan mode and the other indoor units in cooling mode. When the unit is operating in fan mode, the LEV is fully closed and the temperature sensed by the thermistor is not low.
Address switch setting
Test point diagram 1. Indoor controller board
SW2 Inverter function setting CNVDC Connect to the NF board CNINV Connect to the FAN motor. CN15V Connect to the power supply board CNRS2 Connect to the power supply board CNCT1 Connect to the FAN motor. Rotor position sensor input) CNCT2 Connect to current sensor CNTH Connect to thermistor (heat sink) CN3A.
Dipswitch setting (Factory setting) 1. Function setting
Changes made to switches SW1, SW2 and SW3 will become effective when the unit stops (remote control off). Changes made to the SWA and SWC switches take effect immediately regardless of the unit's operating status (RUN/STOP) or remote control status (ON/OFF).
CAUTION
When using PAR-30MAA remote controller, the static pressure settings can be made from the remote controller. To set the external static pressure from the function selection screen on the remote control (PAR-30MAA only) Follow the instructions below and the instructions detailed in the remote control manual for how to set the switches. Set the function setting no. 8 and no. 10 on appropriate values, according to the external static pressure.
The steps below explain how to configure the settings on the MA Smart Remote Controller. The actual static pressure setting and the dip switch setting may not match if the setting is set from the remote control. institution. Refer to the remote control manual for setting the service menu items.).
Using the F1 to F4 buttons, set the settings for the M-NET address, No. Function and Data, select "Set" and press the Enter key. Refer to the remote control manual for how to configure the items in the service menu.). Changes to switches SW11, SW12, SW14 and SW15 must be made when the unit is stopped and the remote control is ON.
9] Disassembly Procedure
- Control box
- Thermistor (Intake air)
- Thermistor (Gas pipe) (Liquid pipe) · LEV
- Drainpan
- Heat exchanger
- Reactor, fan, and fan motor
Remove the control box cover following the procedure in Chapter 1. 1) Remove the ten mounting screws on the cover (D), cover (E) and cover (F) to remove the maintenance cover. Thermistor size Liquid line: ø8mm Gas line: ø6mm 4. 1) Disconnect the connectors (CN60 and CN7V) from the indoor controller board. Remove the drain pan following the procedure in Chapter 4. 1) Remove the four mounting screws on the heat exchanger (N) to remove it.
Remove the control box cover following the procedure in section 1. Removing the fan motor and ACL cable.
10] Optional parts
