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Electric wiring
(1) Before starting test run (for all Heat pump models)
Confirm whether the power source breaker (main switch) of the unit has been
turned on for over 12 hrs to energize the crankcase heater in advance of operation.
(2) Test run
Run the unit continuously for about 30 minutes, and check the following.
Suction pressure at check joint of service valve for gas pipe.
Discharge pressure at check joint on the compressor discharge pipe.
Temperature difference between return air and supply air for indoor unit.
Installation Procedure
Note:
For display of LED board, the number "1" mean the LED is light. the number "0" mean
the LED is OFF.
User should not to change the dip switch of LED board.
Please consult the operation and instrucion to get detailed information about outdoor
unit trouble.
Trouble description
Abnormal of DC moter
Compressor discharging temprerture protection
Spdu module over current protection
Abnormal of piping sensor or suction sensor
High pressure protection
Eeprom failure
Communication error between indoor and outdoor
unit
Abnormal of outdoor ambietn sensor
Compressor JAM
Abnormal of compressor discharge sensor
Compressor vibration abnormal
The power supply is not the 50Hz
Display of LED borad Analyze and diagnose
Spdu module failure
00001 Spdu module failure
00010
00011
00100
00101
00110
Compressor start-up abnormal
Rotor of inner compressor is malposition
Position-inspect circuit failure
Compressor failure
Compressor suction sensor over high
Communication error between main board and
spdu module
Low pressure protection
00111
01000
01001
01110
01111
10000
10001
10010
10011
10100
10101
10110
11000
01010
Jam of DC motor or motor failure
Communication fail over 4min
Compressor discharging tempreature
over 120 centigrade
Current of spdu module over 21A last
4set
Outdoor ambietn sensor short-circuit or
open-circuit last 3sec
Piping sensor or suction sensor short-
circuit or open-circuit last 3sec
System high pressure over 4.5Mpa
Compressor discharge sensor short-
circuit or open-circuit
The power supply is not the 50Hz
Outdoor main board eeprom fail
Inner compressor is abnormal
Compressor vibration abnormal when
start-up
Compressor start-up abnormal
Rotor of inner compressor is malposition
when start-up
Position-inspect circuit failure of spdu
module
Compressor failure
In operation the suction temperature
over 40 centigrade
Communication error between main
board and spdu module
System low pressure under 0.15Mpa
Spdu module temperture protection
10111
Spdu module temperture is too high
10. Trouble display
LED 5-4-3-2-1