Theratherm 09i, User And Service Manual

Page: 25 / 47

23 A Division of:
EE 24
Ambient
Temperature
device failure on
Driver board
Ambient Temperature device failure Change driver board or main board
EE 25
Compressor
phase failure
Compressors U, V, W are connected to one
phase or two phases
Check the actual wiring according to the
circuit diagram
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
failed input of EEPROM data
2. Main board failure
or
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 restart it
2. Change a new main board
and
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
temperature is too low
inlet
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