Mitsubishi Heavy Industries FDT71VNXVD Service Manual

50, -  - None Excessive noise/vibration (3/3) –– –– 1. Applicable model 5. Troubleshooting All models Diagnosis Countermeasure Adjustment during commissioning Does noise/vibration occur when the cooling/heating operation is in anomalous condition? From 2/3 If insufficient cooling/…

16, - 21 - '10 • PAC-SM-137A (3) Compressor soft start control (a) Compressor protection start I [Control condition] Normally, the compressor operation frequency is raised in this start pattern. [Control contents] 1) Starts with the compressor’s target frequency at A rps.…

39, - 39 - '10 • PAC-SM-137A (5) Check of anomalous operation data with the remote controller Operation data can be checked with remote control unit operation.  Press the button. The display change “ ”  Press the (SET) button while “ ” is displayed.  When only o…

89, – 99 – '10 • PAC-SM-137A E57 Insufficient refrigerant amount or detection of service valve closure 1. Applicable model 5. Troubleshooting All models Diagnosis Countermeasure NO YES NO YES Is the service valve fully opened? Are the connections of indoor heat exchang…

91, Mitsubishi Heavy Industries FDT71VNXVD – 91 – '10 • PAC-SM-137A Thermistor (Return air) (ThI-A) Thermistor (Heat exchanger) (ThI-R3) Thermistor (Heat exchanger) (ThI-R2) Thermistor (Heat exchanger) (ThI-R1) Heat exchanger Indoor unit Outdoor unit Flare connecting Flare connecting Thermistor (ThO-D) Thermistor (ThO-S) …

11, - 11 - '10 • PAC-SM-137A (s) Abnormal temperature thermistor (return air/indoor heat exchanger) wire/short-circuit detection 1) Broken wire detection When the return air temperature thermistor detects -50°C or lower or the heat exchanger temperature thermistor detect -50°C or lower…