Page 42 Display Causes Abnormal point and detecting method Check points Overvoltage or voltage shortage Decrease of power supply voltage Check the facility of power supply. Page 43 Display Abnormal point and detecting method Check points Causes Stop valve of outdoor unit is closed.
Page 47 Display Abnormal point and detecting method Check points Causes Pressure sensor 63HS When detected pressure in high-pressure High-pressure sensor failure Check the high-pressure sensor. When the detected pressure is 1 MPa Internal pressure decrease by gas Check the internal pressure. Page 48 Display Abnormal point and detecting method Check points Causes Transmission bus busy error Over error by collision The transmission processor cannot be Check whether the transmission line of transmitted since a short cycle voltage the indoor unit, fresh master, lossnay Abnormality when the state, which cannot of the noise etc.
Page 49 Display Abnormal point and detecting method Check points Causes No ACK Acknowledgement Factor that does not related to origin Turn off power supply of outdoor unit, indoor unit fresh master and lossnay Abnormality which controller of the Since the address switch was changed for 2 minutes or more at the same sending side detects when there is no with the current passed, the unit in the Page 50 Display Abnormal point and detecting method Check points Causes When the cause of displayed address and When operating with multi refrigerant attribute is on the remote controller side system indoor units, the indoor units transmits the signal to the remote controller after the other refrigerant The indoor unit detects when there is no system outdoor unit is turned off or Page 51 Display Abnormal point and detecting method Check points Causes Transmission repeats the failure by the Check the transmission wave and No response noise etc.
Though there was a replay ACK of having received signal from the other side, it is the abnormality when the response command does not return. Page Remote Controller Diagnosis First, check that the power-on indicator is lit. If the correct voltage DC12 V is not supplied to the remote controller, the indicator will not light. Page 54 Page 55 Page 56 Page 58 Page 59 Give attention to the service.
It causes trouble of the outdoor controller circuit Self check Page 61 Check method of multi controller board Multi controller board check Fuse check Check the fuse on Multi controller board Yes blow Replace Multi board and fan motor.
Did the fuse F blow? Check the SV1 and 21S4 and wiring. Test points are limited. Active Filter Module Test points are limited. Page 66 Page 67 Page 74 OFF Bear in mind ambient conditions ambient temperature, direct sunlight, rain water,etc. Page 82 Selection number of control wires M-NET remote controller Remote controller used in system control operations. Page 83 First read the data on the selected indoor and outdoor units and then use the following formulas to calculate the electrical characteristics before applying for a capacity agreement with the local electric power company.
Page 86 Note: The total of downstream unit models in the table is the total of models as seen from point A in the figure above. Note: Pipe re-branching after the header branching is not possible. The following standards may be applicable if local regulations are not available.
Introduction 2 Calculate room volumes K[ft ] and find the room with the smallest volume RA refrigerant of this air conditioner is non-toxic and Page 89 From the previous page. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.
See figure 1. Removing bypass valve coil SV1 and bypass valve 1 Remove the service panel. Removing the compressor MC 1 Remove the service panel. See photo 3. Drawing No. Page 94 Page 95 Part numbers that are circled are not shown in the figure.
Page 97 Part numbers that are circled are not shown in the figure. Page 98 Distributed in Jul. This manual is also suitable for: City multi pumy-p48nhmu City multi pumy-p36nhmu-bs City multi pumy-p48nhmu-bs City multi pumy-p48nhmu1 City multi pumy-p48nhmu2 City multi pumy-p48nhmu1-bs Show all City multi pumy-p48nhmu2-bs.
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