Midea mcd-24hrdn1, Service Manual

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Troubleshooting
198 Electrical Control System
6 IPM module protection
☆
X X O E5
7
Open or short circuit of T3 or T4 temperature
sensor
☆
O X X E6
8 Outdoor unit voltage protection
☆
O X O P0
9 Compressor temperature protection
☆
X O X P1
10 Outdoor unit over-current protection
☆ ☆
X
☆
P2
O(light) X(off)
☆
(flash at 5Hz)
For console type(12K)
NO. Malfunction Running lamp Timer lamp Defrosting lamp
1
Communication malfunction between indoor and outdoor
units.
X
☆
X
2 Open or short circuit of T1 temperature sensor
☆
X X
3 Open or short circuit of T2 temperature sensor X X
☆
4 Indoor EEPROM malfunction
☆ ☆
X
5 IPM module protection
☆
X
☆
6 Open or short circuit of T3 or T4 temperature sensor
☆ ☆ ☆
7 Outdoor unit voltage protection ☆ ☆ O
8 Outdoor unit over-current protection ☆ O O
9 Top temperature protection of compressor ☆ O X
10 Inverter compressor drive protection ☆ ◎ X
11 Indoor fan Speed has been out of control. ☆ O ☆
12 Outdoor fan malfunction X ☆ O
O(light) X(off)
☆
(flash at 5Hz)
◎
(flash at 0.5Hz)
For console type(18K)
NO. Malfunction Running lamp Timer lamp Defrosting lamp
1 Indoor EEPROM malfunction ☆ ☆ ☆
2 Indoor fan Speed has been out of control. ☆ X ☆
3 Open or short circuit of T1 or T2 temperature sensor ☆ ☆ X
4
Communication malfunction between indoor and outdoor
units.
X
☆
X
5 Outdoor unit malfunction X X
◎
X(off)
☆
(flash at 5Hz)
◎
(flash at 0.5Hz)
For compact 4-way cassette(18K)&ceiling & floor(18-30K)
NO. Malfunction Running lamp Timer lamp Defrosting lamp Alarm lamp
1
Communication malfunction between indoor and
outdoor units.
X ☆ X X
2 Open or short circuit of T1 or T2 temperature sensor
☆
X X X
3 Full-water malfunction X X X
☆
4 Outdoor unit malfunction X X X
◎
X(off) ☆ (flash at 5Hz) ◎ (flash at 0.5Hz)