Daikin MD5 - Group 81: PFA Control

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Group 81: PFA Control

Table 22: Group 81: PFA Control

Code Description Range Resolution Default S

8120 INTERLOCKS 0…6 1 4 (DI4)



Denes operation of the Interlock function. When the Interlock function is enabled:

• An interlock is active when its command signal is absent.

• An interlock is inactive when its command signal is present.

• The MD5 will not start if a start command occurs when the speed regulated motor’s interlock is active – the control panel displays an alarm.

Wire each Interlock circuit as follows:

• Wire a contact of the motor’s On/Off switch to the Interlock circuit – the drive’s PFA logic can then recognize that the motor is switched off and start the

next available motor.

• Wire a contact of the motor thermal relay (or other protective device in the motor circuit) to the Interlock input – the drive’s PFA logic can then recognize

that a motor fault is activated and stop the motor.

0 = NOT SEL – Disables the Interlock function. All digital inputs are available for other purposes.

• Requires 8118 AUTOCHNG INTERV = 0.0 (The Autochange function must be disabled if Interlock function is disabled.)

1 = DI1 – Enables the Interlock function and assigns a digital input (starting with DI1) to the interlock signal for each PFA relay. These assignments are

dened in the following table and depend on:

• the number of PFA relays [number of parameters 1401…1403 and 1410…1412 with value = 31 (PFA)]

• the Autochange function status (disabled if 8118 AUTOCHNG INTERV = 0.0, and otherwise enabled).

No. PFA relays Autochange disabled (P 8118) Autochange enabled (P 8118)

0 DI1: Speed Reg Motor Not allowed

DI2…DI6: Free

1 DI1: Speed Reg Motor DI1: First PFA Relay

DI2: First PFA Relay DI2…DI6: Free

DI3…DI6: Free

2 DI1: Speed Reg Motor DI1: First PFA Relay

DI2: First PFA Relay DI2: Second PFA Relay

DI3: Second PFA Relay DI3…DI6: Free