Midea RSJ-15/190RDN3-D

MCAC-RTSM-2011-12 Midea Combo Type Heat Pump Water Heater Technical Manual
53
G. "E9": The suction temperature sensor (Th) error
Display
E9
Method of
malfunction
detection
Check whether Th temperature sensor cable are connected correctly.
Supposed
Causes
1. Temperature sensor cables don’t connect correctly.
2. The sensor terminal is loose.
3. The sensor circuit is short or open
4. The main control board's clamp diodes are short or open.
Troubleshooting
E9
Is Th port on PCB loose?
Temperature sensor is
short or defective.
The chip's pins do not match
correctly or the chip is
defective. Turn the power on
again, is”E9”displayed?
Insert the chip correctly or replace it with
a fine one
Replace the temperature
sensor
Replace the main
control board.
YES
NO
YES
NO
Fasten the port.
YES
NO