Daikin FT25JV1B - Installation Manual

7 4. Connection method to product Basically, Transmission Monitor should be connected to the communication wires ( 3 wires ) of indoor and outdoor units. As for some RA products produced in and after 2001, assignment of transmission wire has been changed from No. 2 to No.3 of the terminal block. The...

9 6. Transmission Monitor display Since the number of letters to display on the LCD of Transmission Monitor is limited, abbreviations are used to display the data. This chapter explains what the display indicates. The LCD can display 4 lines × 16 letters. “line x” in this document should be read as ...

11 6-4 Meaning of Abbreviation Transmission from outdoor unit to indoor unit Abbreviationsin English Meaning Abbreviationsin English Meaning Active ON Htpump Heat pump ALARM ON INV Inverter CAUTION CAUTION ERROR Multi Multi system Comp TH Compressor head temperature no data No data Cool Cooling only...

12 7. Problem diagnosis Since the respective model has its own characteristics, all problem diagnosis cannot be described in details. This chapter describes typical diagnosis (in which the Transmission Monitor is used effectively) for individual cases. In the chart, the inspection item which is not ...

13 Procedure of Indoor Unit Diagnosis If LED-B (green) on indoor unit PC board is off, the transmission wiring between indoor and outdoor unit is incorrect or disconnected. Green Blinks when normal LED on 䃂 LED off LED blinks <Indoor unit PC board LED> 䋭 No connection with diagnosis Green Cont...

16 Replace indoor unit PC board. Malfunction 7-3: Indoor Unit LED-B On Possible causes Ԙ Faulty indoor unit PC board (Reference) LED-B displays the sent data transmitted between indoor and outdoor unit. Since LED-B cannot be turned on, faulty PC board is suspected.

23 YES NO OK YES NO Is the unit operating beyond the specified range? Explain the specified range for continuous operation to improve the operating conditions. NG Is value of each temperature thermistor close to measured value? Replace the thermistor. (If the malfunction is not remedied even when th...

25 NO YES NO NG OK NO NG OK Is value of each temperature thermistor close to measured value? Replace the thermistor. (If the malfunction is not remedied even when the thermistor is replaced, replace the PC board.) YES Does refrigerant leak? Repair the leaking point and charge the specified amount of...

27 Malfunction 7-12: Problem Diagnosis for Twin/Triple/Double twin multi-unit of Skyair using a R22 refrigerant Possible cause This system is provided with several indoor units, which are defined as master unit ( with remote controller connected ) and as slave unit. On the Transmission Monitor the m...

28 Malfunction 7-13: Water leakage occurs under a certain condition. Possible causes It may be difficult to reproduce water leakage under a certain condition at factory. Providing objective data can support to shorten the response time. Example: The following information can be transmitted. Ԙ Since ...

30 8. Check method of microcomputer software version built in transmission checker When supplying power for the Transmission Monitor by pushing the IN/OUT changeover switch, the following display appears on LCD. Communication Monitor Vx.xx عععععععععععععععععععععع V2.00 is the latest version as of Nov...