Error code

Mitsubishi Electric PQRY code 7102

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Meaning

Heat source Error in the number of connected units unit The number of connected to the heat source units exceeds the allowable value.

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Possible causes

(1) Number of indoor units connected to the heat source unit terminal block (TB3) for indoor/outdoor transmission lines exceeds limitations described below. Restriction on the Number of units number of units (1) Total number of 1-15 : 200 model indoor units 1-16 : 250 model (2) Total number of indoor units + 1-35 Fresh Master + M-NET remote controllers (3) Total number of 1 BC controllers (4) Total number of Fresh Master + LOSSNAY 0 or 1 (During auto address start-up only) (2) The address of heat source unit is set to 51-100 when it is the auto address (MA remote controller (MA)). "HO" will be displayed on the MA remote controller (MA). (3) Disconnected transmission line of the heat source unit (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 M-NET remote controller. In the case of MA remote controller (MA) → "HO" will blink. (5) Disconnected transmission line of the BC controller.

Solution

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