AES Hydro-Pro Inverter 07, User And Service Manual

Page: 26 / 39

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EE 26
Four-way valve
reversal failure
1. Four-way valve reversal failure
2. Lack of refrigerant (no detect
when T3 or T5 malfunction)
1. Switch to Cooling mode to check
the 4-way valve if it has been reversed
correctly
2. Change a new 4-way valve
3. Fill with gas
EE27
EEPROM data read
malfunction
1. Wrong EEPROM data in the
program or failed input of EEPROM
data
2. Main board failure
1. Re-enter correct EEPROM data
2. Change a new main board
EE28
The inter-chip
communication
failure on the main
control board
Main board failure
1. Turn off electricity supply and
restart it
2. Change a new main board
PP 01
Inlet water
temperature sensor
failure
1. The sensor failure or short circuit
2. The wiring of sensor is loose 1. Re-fix the wiring of the sensors
2. Change the sensor
PP 02
Outlet water
temperature sensor
failure
1. The sensor failure or short circuit
2. The wiring of sensor is loose 1. Re-fix the wiring of the sensors
2. Change the sensor
PP 03
Heating piping
sensor failure
1. The sensor failure or short circuit
2. The wiring of sensor is loose 1. Re-fix the wiring of the sensors
2. Change the sensor
PP 04
Gas return sensor
failure
1. The sensor failure or short circuit
2. The wiring of sensor is loose 1. Re-fix the wiring of the sensors
2. Change the sensor
PP 05
Ambient
temperature sensor
failure
1. The sensor failure or short circuit
2. The wiring of sensor is loose 1. Re-fix the wiring of the sensors
2. Change the sensor
PP 06
Exhaust piping
sensor failure
1. The sensor failure or short circuit
2. The wiring of sensor is loose 1. Re-fix the wiring of the sensors
2. Change the sensor
PP 07
Antifreeze
protection in
Winter
Ambient temperature or water inlet
temperature is too low
Normal protection
PP 08
Low ambient
temperature
protection
1. Beyond the scope of using
environment
2. Sensor abnormality 1. Stop using, beyond the scope of
using
2. Change the sensor
PP 10
Piping temperature
too high protection
under cooling mode
1. Ambient temperature is too high
or the water temperature is too high
in cooling mode
2. Refrigeration system is abnormal
1. Check the scope of using
2. Check refrigeration system
PP 11
Water temperature
(T2) too low
protection under
cooling mode
1. Low water flow
2. T2 temperature sensor abnormal
1. Check water pump and waterway
system
2. Change T2 temperature sensor