Error code

Mitsubishi Electric PQHY code 7102

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Meaning

Heat source Error in the number of unit connected units The number of connected indoor units is "0" or exceeds the allowable value.

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Possible causes

(1) Number of indoor units connected to the heat source terminal block (TB3) for indoor/heat source transmission lines exceeds limitations described below. Restriction on the Number of units number of units (1) Total number 1-13 : P72 model of indoor 1-16 : P96 model units (2) Total number of LOSSNAY units 0 or 1 (During auto address startup only) (2) The heat source unit address is set to 51-100 although the address is automatically set up (MA remote controller). ("HO" or "PLEASE WAIT" appears on the display on MA remote controller.) (3) Disconnected transmission line of the heat source unit (4) Short-circuited transmission line When (2) and (3) apply, the following display will appear. In case of M-NET remote controller -> Nothing appears on the display as no power is supplied to the remote controller. In the case of MA remote controller -> "HO" or "PLEASE WAIT" will blink. (1) 1-15 : P72 model Total number of indoor units 1-19 : P96 model (2) Number of BC 1 controllers (3) 0 or 1 Number of Main BC controllers (4) Number of Sub 0,1 or 2 controllers BC (5) Total number of 0 or 1 units LOSSNAY (During auto address start-up only) (4) Short-circuited transmission line When (3) and (4) apply, the following display will appear. In case of M-NET remote controller -> Nothing appears on the display as no power is supplied to the remote controller. In the case of MA remote controller -> "HO" or "PLEASE WAIT" will blink (5) Disconnected transmission line on BC controller

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