Error code

Mitsubishi Electric PUHZ code P9

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Meaning

2 11-4. TROUBLESHOOTING Phenomena 1. Remote controller work. 2. “PLEASE WAIT” on the remote: -18 -17 Tcond SW75 SW100/120 tank temperature thermistor The unit is 3-minute resume tion mode if short/open of detected. Abnormal if the reset normally after 3 minutes. returns to normal operation, reset normally) Constantly detected during heating, heating ECO, anti hot water operation. display does not 1 2 display is remained 1 controller. 2 3 4 controller 1 After cancelling OPERATION controller, it will be be not wireless 1The pair beep is heard controller start operatis indicated wireless 1

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Possible causes

15 -14 -12 -11 -9 -8 -6 stage-a stage-b stage-c stage-d stage-e stage-f 63 61 60 58 56 53 63 62 61 60 59 57 (TH5) Defective thermistor character1 prevenistics thermistor is Contact failure of TB61 No. 5-6 2 unit does not on PCB of interface unit/Flow (The unit temp. controller if it has been Breaking of wire or contact 3 failure of thermistor wiring Defective PCB of interface 4 cooling, unit/Flow temp. controller freeze and Factor DC12V is not supplied to remote controller. (Power supply display is not indicated on LCD.) DC12~15V is supplied to remote controller, however, no display is indicated. • “PLEASE WAIT” is not displayed. • “PLEASE WAIT” is displayed. At longest 2 minutes after the power supply “PLEASE WAIT” is displayed to start up. Communication error between the remote controller and indoor unit Communication error between the indoor and outdoor unit Outdoor unit protection device connector is open. to select function from the remote 1 Normal the remote controller operation switch will accepted for approx. 30 seconds. number settings of the wireless remote 1Check and indoor controller board are mismatched. for 2 minutes at most after the power 1Normal ON. controller operation is prohibited. 2Normal controlling adaptor is connected to CN32 indoor controller board. remote controller operation is prohibited controller etc. since it is connected to of No.2. 3Check shortage 1• If ture Inspect perature • Check 2Open Clean it. clogging 3• If perature increases. clogged su

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