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Midea VRF Series

Midea VRF Series
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V6R VRF 50/60Hz
143
2.29 CA1, CA2, CA3, CA4, CA5: Connection combination error
Digital display output
Description
Connection combination error.
All units stop running.
Error code is only displayed on the master unit.
Trigger / recover condition
Trigger condition:
The types of inside equipment that can be connected to the V6R series heat recovery outdoor unit include:
Standard air-cooled indoor unit (Fresh air indoor unit is treated as standard indoor unit)
AHU KIT
High temperature hydraulic module HT
The following connection combinations are allowed:
VRF Indoor + AHU KIT
VRF Indoor + HT
VRF Indoor only
In addition to the above three cases, when the remaining connection combination is detected, the connection
combination failure is reported.
CA1
The system contains non-V6 series units (the highest priority).
CA2
Only AHU KIT.
CA3
Only HT
CA4
Only HT + AHU KIT
CA5
VRF Indoor + AHU KIT + HT
Recover condition:
Detected correct combination.
Reset method: Manually restart.
Possible causes
Combination does not meet the requirements.
Procedure
CA1, CA2, CA3, CA4, CA5
Change indoor unit combination

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