Error code

Mitsubishi Electric PQRY code 6607

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Meaning

(Continued) Error source address Heat source unit (OC) BC controller (BC) Indoor unit (IC) Fresh Master (FU): No ACK abnormality The transmission. interval, Note: Error Detection display method M-NET remote No acknowlSame controller (RC) edgement one MA remote (ACK) at BC controller (MA) transmission to OC M-NET remote No acknowlSame controller (RC) edgement one MA remote (ACK) at IC controller (MA) transmission to BC M-NET reNo acknowl- (1) mote conedgement (2) troller (RC) (ACK) at RC transmission to IC (3) (4) (5) If an once, M-NET reNo ac- (1) mote conknowltroller (RC) edgement MA remote (ACK) at IC | (Continued) Error source address Heat source unit (OC) BC controller (BC) Indoor unit (IC) Fresh Master (FU): No ACK abnormality The transmission. interval, Note: Error Detection display method M-NET reNo acSame one mote conknowltroller (RC) edgement System (ACK) at controller BC trans- (SC) mission to MA remote OC controller (MA) M-NET reNo acSame one mote conknowltroller (RC) edgement System (ACK) at IC controller transmis- (SC) sion to BC MA remote controller (MA) M-NET reNo acSame tem mote conknowltroller (RC) edgement (ACK) at RC transmission to IC System No ac1.Error (1) controller knowl- (SC) edg | (Continued) Error source address System controller (SC): No ACK abnormality The transmission. interval, Note: Error Detection display method M-NET reNo ac1.Error mote conknowltroller (RC) edgement (1) MA remote (ACK) at IC controller transmis- (2) (MA) sion to SC (3) 2.Erro

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Possible causes

error is detected when no acknowledgement (eg. When the data is transmitted the error is detected on the transmission The address/attribute appeared indicates the controller which did Cause cause as that for system with Same heat source unit heat Same causes as (1) - (5) for system 1) with one heat source unit Disconnection or short circuit of the transmission line for the heat source unit on the terminal block for centralized control line connection (TB7) When multiple heat source units are connected and the power source of one of 2) the heat source units has been shut off. The male power supply connector of the heat source unit is not connected to the female power supply switch connector (CN40). 3) The male power supply connectors on 2 or more heat source units are connected to the female power supply switch connector (CN40) for centralized control. error occurs, after the unit runs normally the following causes may be considered. Total capacity error (7100) Capacity code error (7101) Error in the number of connected units (7102) Address setting error (7105) Same causes as (1) - (4) for system 1) with one heat source unit (Interlocked operation between Fresh Master and the indoor units in the system in which the indoor units connected to different heat source units are grouped) Disconnection or short circuit of the transmission line for the heat source unit on 2) the terminal block for centralized control line connection (TB7) When multiple heat source units are connect

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