Midea VRF Series User Manual

V6R VRF 50/60Hz
143
Part
6
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Diagnosis and Troubleshooting
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

Midea VRF Series Specifications

General

Compressor Type	Inverter Scroll Compressor
Type	Variable Refrigerant Flow (VRF)
Refrigerant	R410A
Control	Centralized control, individual control
Indoor Unit Types	Wall mounted, cassette, ducted, floor standing
Energy Efficiency	High energy efficiency with DC inverter technology
Indoor Unit Noise Level	19 dB(A) to 45 dB(A)