Midea MHA-V6W/D2N8-B User Manual

M thermal Split
82 202004
Midea M thermal Split
Service Manual
Procedure 4.19.4
P5
Water side heat exchanger water inlet /
outlet temperature sensor is loose
1
Yes
Ensure the temperature sensor is
connected properly
No
Water side heat exchanger water inlet /
outlet temperature sensor has
short-circuited or failed
2
Yes
Replace the temperature sensor
No
Water piping contains air
Yes
Purge air from the water system
3
No
The water flow rate is not sufficient,
caused by crushed or bent water piping,
incorrect pump speed setting, high
resistance in water piping or broken
expansion vessel
4
Yes
Inspect the system and fix the error
No
Replace hydronic box main PCB
Notes:
1. Water side heat exchanger water inlet temperature sensor and water side heat exchanger water outlet temperature sensor connections are port CN6 on
the hydronic box main PCB (labeled10 in Figure 4-2.1 in Part4, 2.2 "Main PCB for Hydronic System").
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 Part 2, 1.2 Hydronic Box Layout and to Table 5-5.3 in Part 5, 5.1
.
3. Refer to the M thermal Split Engineering Data Book, Part 5, 1
4. Check water pressure on the manometer. If the water pressure is not > 1 bar, water flow is insufficient. Refer to Figures 2-1.7 and 2-1.8 in Part 2, 1.2
.
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Midea MHA-V6W/D2N8-B Specifications

General

Brand	Midea
Model	MHA-V6W/D2N8-B
Category	Air Conditioner
Language	English