V6R VRF 50Hz
94
Midea
V
6R
Series S
er
vice M
anual
2.6
E7: Discharge Temperature sensor error (T7C1)
Digital display output
Description
A compressor top temperature sensor or discharge pipe temperature sensor (T7C1) error.
All units stop running.
Error code is displayed on the unit with the error.
Trigger / recover condition
Trigger condition: Discharge pressure ≥ 3.0MPa and discharge temperature < 15
o
C for 2 minutes when the compressor
is running.
Recover condition: Discharge pressure and temperature go back to normal.
Reset method: Manually restart.
Possible causes
Temperature sensor not connected properly or has malfunction.
Outdoor main PCB damaged.
Procedure
E7
Temperature sensor connection on
outdoor main PCB is loose
1
Yes
Ensure the sensor is connected properly
No
Temperature sensor has short-circuited
or failed
2
Yes
Replace the sensor
No
Replace the outdoor main PCB
Notes:
1.
Compressor discharge pipe temperature sensor connections are ports CN4 on the outdoor main PCB
2.
Measure sensor resistance. If the resistance is too low, the sensor has short-circuited. If the resistance is not consistent with the sensor’s resistance
characteristics table, the sensor has failed. Refer to Table 6-4.2 in Part 6, 4.1 “Temperature Sensor Resistance Characteristics “.
