Mitsubishi Electric CAHV-R450YA-HPB Service Manual

Other manuals for Mitsubishi Electric CAHV-R450YA-HPB

Installation & Operation Manual76 pages

• R

  rosborneAug 4, 2025

  How to troubleshoot a Mitsubishi Electric CAHV-R450YA-HPB Heat Pump that does not operate?

  

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  • S

    Stephanie HoltAug 4, 2025

    If your Mitsubishi Electric Heat Pump isn't turning on, first ensure that the main power switch is on. Also, check that the pump interlock circuit and the flow switch wiring are correctly connected to the system. A short-circuited circuit or ground fault could also be the issue; resolve the cause and replace the fuse. Lastly, verify that the setting for the automatic Start/Stop thermistor isn't set too low and adjust it if necessary.

    

    Reply
• C

  Christopher RogersAug 18, 2025

  What to do if Mitsubishi Electric CAHV-R450YA-HPB Heat Pump is running but the water does not heat up?

  

  Same questionReply

  • D

    Dominique HarrisonAug 18, 2025

    If your Mitsubishi Electric Heat Pump is running but not heating the water, there are several potential causes. A too high water-heating load might be the reason, consider installing more units. A low refrigerant charge due to a leak could also be the problem; in this case, perform a leakage test, repair any leaks, evacuate the system, and recharge the refrigerant circuit. Other potential issues include a LEV fault (replace the LEV), compressor failure (replace the compressor), high or low pressure outside the specified range (operate the units within the correct pressure range), water flow shortage (increase the water flow rate), or problems with external devices (repair the devices).

    

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Mitsubishi Electric CAHV-R450YA-HPB Specifications

General

Brand	Mitsubishi Electric
Model	CAHV-R450YA-HPB
Category	Heat Pump
Language	English

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