Midea VRF Series User Manual

V6R VRF 50/60Hz
132
Midea
V6R
Series Service Manual
2.23 P4, H6: Discharge temperature protection or discharge temperature switch protection
Digital display output
Description
 Discharge temperature protection.
 All units stop running.
 Error code is displayed on the unit with the error.
Trigger / recover condition
 Discharge temperature protection
 Trigger condition:
For P4 protection: Discharge temperature (T7C1) ≥ 115
o
C.
 Recover condition: Discharge temperature (T7C1) < 90
o
C.
 Reset method:
For P4 protection: Resume automatically.
 Discharge Temp. switch protection
 Trigger condition: Discharge temperature ≥ 115
o
C.
 Recover condition: Discharge temperature < 75
o
C.
 Reset method: Resume automatically.
 H6 protection
 For H6 protection: P4 protection appears three times in 100 minutes.
 Reset method:
For P4 protection: Resume automatically.
For H6 protection: Manually restart.
Possible causes
 Outdoor unit stop valves are closed.
 Temperature sensor/switch not connected
properly or has malfunction.
 Insufficient refrigerant.
 System blockage.
 Indoor load too large.
 System contains air or
nitrogen.
 Poor condenser heat exchange.
 Outdoor main PCB damaged.

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)