GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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(4) Cautions on Replacement of Slave IDU AP1
If the AP1 of a slave IDU needs to be replaced, after it is powered on, “Project number conflict (C5)”
alarm may be reported. Refer to section 3.1.2.3 “Cautions on Replacement of Master IDU AP1” to
address the issue.
3.1.3 Cautions on Wired Control Replacement
3.1.3.1. Cautions on Wired Control XK46 Replacement
(1) If the wired control to be replaced controls only one IDU, directly replace the control.
(2) If the wired control to be replaced controls multiple IDUs, perform the steps below first:
Set the wired control parameter “P14” to change the number of managed IDUs to the actual quantity
the control manages. For example, if the wired control manages 3 IDUs, set this parameter to 3. If you
keep the default value 1, the LCD displays L9 (as shown in the figure below).
(3) If there are two wired controls controlling one or multiple IDUs, perform the steps below first:
Set the wired control parameter “P13” to change the address of one control to 01 (master) and that
of the other control to 02 (slave); otherwise, a CP (multiple master wired controls) fault alarm will be
reported (as shown in the figure below).
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