Ca1, Ca2, Ca3, Ca4, Ca5: Connection Combination Error - Midea VRF Series Service Manual

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
CA2
CA3
CA4
CA5
 Recover condition:
Detected correct combination.
 Reset method: Manually restart.
Possible causes
 Combination does not meet the requirements.
Procedure
The system contains non-V6 series units (the highest priority).
Only AHU KIT.
Only HT
Only HT + AHU KIT
VRF Indoor + AHU KIT + HT
CA1, CA2, CA3, CA4, CA5
Change indoor unit combination
V6R VRF 50/60Hz
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