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16.3.11 Outdoor IPM module temperature sensor malfunction diagnosis and solution (P7)
Error Code
P7
Malfunction conditions
If the sampling voltage is lower than 0.06V or higher than 4.94V,
the LED displays a failure.
Potential causes
●
Wiring mistake
●
Faulty sensor
●
Faulty PCB
Trouble shooting:
Check the connection
between temperature
sensor and PCB. Is it
properly wired?
Ensure proper connection
No
Yes
Replace outdoor main PCB
Measure the resistance
value of the sensor. Is it
within acceptable
parameters?
Replace the sensor
No
Yes
16.4 Main parts check
1. Temperature sensor checking
Disconnect the temperature sensor from PCB, measure the resistance value with a tester.
Temperature Sensors.
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(T5) sensor.
Measure the resistance value of each winding by using the multi-meter.
Summary of Contents for 38QUA009DS
Page 8: ...5 2 2 Part names of Indoor Outdoor units Cassette Unit...
Page 9: ...6 A5 Ducted Units A6 Ducted Units...
Page 10: ...7 Floor ceiling Units...
Page 11: ...8 HESP DUCTED Units...
Page 35: ...32 6 Wiring Diagram 6 1 Indoor Unit 40QTD018DS 40QTD024DS 40QTD036DS 40QTD048DS...
Page 36: ...33 40QSM018DS 40QSM024DS 40QSM036DS 40QSM048DS...
Page 37: ...34 40QZL018DS 40QZL024DS 40QZL036DS...
Page 38: ...35 40QZL048DS 40QZL060DS...
Page 40: ...37 6 2 Outdoor Unit 38QUA018DS 38QUA024DS...
Page 41: ...38 38QUA036DS...
Page 42: ...39 38QUA048DS 38QUA060DS...
Page 44: ...41 40QSM018DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 45: ...42 40QSM024DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 46: ...43 40QSM036DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 47: ...44 40QSM048DS Code 0 Code 1 Code 2 Code 3 Code 4...
Page 60: ...57 12 Field Wiring 18K 24K 36K 48K...
Page 61: ...58 60K...
Page 104: ...101 P U P V...
Page 105: ...102 P W P N...