Outdoor Unit Troubleshooting - INVENTOR DR2VI32-09WFI Benutzer- & Installationshandbuch

Outdoor Unit Troubleshooting

CAUTION!
●THIS UNIT WILL BE STARTED INSTANTLY WITHOUT "ON" OPERATION WHEN ELECTRIC POWER IS SUPPLIED.BE SURE TO
EXECUTE "OFF" OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING.
●This unit has a function of automatic restart system after recovering power stoppage.
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.
Flash times
of LED on
mainboard
1 Eeprom failure
2 IPM failure
Communication error between main board and spdu
4
module SPDU Communication erron
5 High pressure protection
8 Compressor discharging temperature protection
9 Abnormal of DC motor
10 Abnormal of piping sensor
11 Suction temperature sensor failure
12 Abnormal of outdoor ambient sensor
13 Abnormal of compressor discharge sensor
15 Communication error between indoor and outdoor unit
16 Lack of refrigerant
17 4-way valve reverse failure
18 Compressor jam(only for spdu)
19 Module PWM select circuit error
25 Compressor U-phase over-current
25 Compressor V-phase over-current
25 Compressor W-phase over-current
26
Trouble description Analyze and diagnose
Outdoor main board eeprom fail
IPM failure
Communication fail over 4min
System high pressure over 4.3 Mpa
Compressor discharging temperature over 110
centigrade.
Jam of DC motor or motor failure
Piping sensor short-circuit or open-circuit
When the The wiring of compressor is wrong or the
connection is poor
Outdoor ambient sensor short-circuit or open-circuit
Compressor discharge sensor short-circuit or open-
circuit
Communication fail over 4min
Check if there is leakage in the unit.
Alarm and stop if detect Tm<=O last for 1min after
compressor has started for 10min in heating mode,
confirm the failure if it appears 3 times in one hour.
Inner compressor is abnormal jamed
Module PWM select wrong circuit
The current of compressor U-phase is too high
The current of compressor V-phase is too high
The current of compressor W-phase is too high