M thermal Split
106
202004
Midea
M t
her
ma
l S
pli
t Ser
vice M
anual
Procedure
4.25.4
bH
Power supply problem. After 5
minutes of power-off interval,
power on again and observe
whether it can be recovered.
Yes
Increase the power voltage to the
required range.
No
PED
1
board broken.
Yes
Replace PED PCB and power on again.
No
IPM module broken.
Yes
Replace IPM module and power on again.
Notes:
1.
PED is port CN22 on the hydronic box main PCB (labeled 11 in Figure 4-2.7:
KHA-12(14,16)RY3
outdoor unit inverter module ).
Midea CAC Confidential
M thermal Split
202004
107
4.26 Pb Troubleshooting
Digital display output
4.26.1
Description
4.26.2
Water side heat exchanger anti-freeze protection.
Split stops running.
Error code is displayed on hydronic box main PCB and
ANTI.FREEZE
icon is displayed on user
interface
Normal system protection.
Temperature sensor not connected properly or has malfunctioned.
Hydronic box main PCB damaged.
Procedure
4.26.4
Pb
1. Outdoor ambient temperature
≤
3°C and water side heat
exchanger water outlet temperature/water inlet
temperature/backup electric heater outlet water
temperature
<
5
℃
2. Water side heat exchanger water outlet temperature/water
inlet temperature/backup electric heater outlet water
temperature
<
2
℃
Yes
Normal system protection. The
system will resume
automatically
1
No
Water side heat exchanger water outlet temperature sensor,
water inlet temperature sensor or backup electric heater outlet
water temperature sensor loose
2
Yes
Ensure the temperature sensor
is connected properly
No
Water side heat exchanger water outlet temperature sensor,
water inlet temperature sensor or backup electric heater outlet
water temperature sensor has short-circuited or failed
3
Yes
Replace the temperature sensor
No
Replace outdoor main PCB
Notes:
1. Refer to Part 3, 5.7 “Water Side Heat Exchanger Anti-freeze Protection Control”.
2. Final outlet water temperature sensor,
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 (labeled 10 in Figure 4-2.1 in Part4, 2.2 "Main PCB for Hydronic System").
3. 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 4-5.3 in Part 4, 5.1 “Temperature Sensor Resistance
Characteristics”.
5 Appendix to Part 4
Midea CAC Confidential
4.26.
3 Possible causes
Split
Содержание KMK-60RY1
Страница 1: ...SERVICEMANUAL SPLIT TYPE HEAT PUMP R32...
Страница 2: ...Split...
Страница 4: ...M thermal Split 2 202004 Midea M thermal Split Service Manual Midea CAC Confidential Split...
Страница 8: ...M thermal Split 6 202004 Midea M thermal Split Service Manual Midea CAC Confidential Split...
Страница 18: ...M thermal Split Midea M thermal Split Service Manual 16 202004 Midea CAC Confidential Split...
Страница 41: ...M thermal Split 202004 39 Midea CAC Confidential Split...
Страница 42: ...M thermal Split 40 202004 Midea M thermal Split Service Manual Midea CAC Confidential Split...
Страница 113: ...Split...
Страница 114: ...kaisai com...