Electra ELAU-VBZ214-H11, Service Manual

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TROUBLESHOOTING
Service Manual – VBZ DCI 1-A.1 GB 13-5
2. Poor heat exchange of Heatsink
3. PFC reactor problem.
4. Abnormal power voltage
5. PFC circuit problem on PCB
Desynchronizing of compressor H7 7
1. Abnormal power input voltage.
2. Compressor
wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
。
Compressor start-up failure Lc 11
1. Compressor wiring mistake
2. Over charged system
3. System not balanced before compressor
starting
4. Compressor problem
Compressor phase current
detection problem
U1 12
Phase current detection circuit for compressor
has problem.
DC over current P5 15
1. Abnormal power input voltage.
2. Compressor
wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
Charging malfunction of
capacitor
PU 17
1. Reactor open
2. Charging relay or other components
damaged on PCB.
HST failure P7 18
1. Senor was broken or damaged
2. PCB temperature detection circuit has
problem
HST over heating protection P8 19
1. Insufficient attachment of IPM module to
Heatsink
2. Outdoor PCB problem.
DC under voltage PL 21
1. AC input voltage is too low
2. Reactor has problem
3. ODU PCB has problem
Lack Phase Protection of
Compressor
Ld
1. Compressor wiring problem
2. Compressor problem
3. IPM module problem or compressor
current detection circuit has problem
4. Compressor malfunction due to EEV
problem
13.1.5 Checking the refrigeration system
Checking system pressures and other thermodynamic measures should be done when system
is in Test Mode (in Test mode, system operates in fixed settings). The performance curves
given in this manual are given for unit performance in test mode when high indoor fan speed is
selected.
Entering test mode please refer to section 12- Control system.
13.2 Simple procedures for checking the Main Parts
13.2.1 Checking Mains Voltage.
Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this
range, abnormal operation of the system is expected. If in range check the Power (Circuit)
Breaker and look for broken or loosed cable lugs or wiring mistake(s).
13.2.2 Checking Power Input.