Goodwe MT series User Manual

8 Caution
Regular maintenance ensures a long operating life and optimal efficiency of the entire PV plant.
Caution: Before maintenance, please disconnect the AC breaker first and then disconnect DC
breaker. Wait 5 minutes until the residual voltage has been released.
8.1 Clearing The FAN
MT series inverter is equipped with three fans on its left side. The fan intakes and handle covers
should be cleaned yearly with a vacuum cleaner. For more thorough cleaning, completely
remove the fans.
1. Disconnect the AC breaker first and then disconnect DC breaker.
2. Wait 5 minutes until the residual voltage has been released and the fans are no longer running.
3. Disassemble the fans (Refer to the below figure).
• Loosen the five screws with a crosshead screwdriver, then remove the fans out of the cabinet
about 50mm slowly.
• Open the lockers of the three fans connectors and remove them from housing, then take the
fans away.
4. Clean the ventilation grid and the fan with soft brush, paint brush, or compressed air.
5. Reassemble the fans into the cabinet.
8.2 Checking The DC Switch
DC switch does not require any maintenance
Though unnecessary, maintenance as below is still recommended:
• Check the DC switch regularly.
• Activate the DC switch 10 times in a row once a year.
Operating the switch will clean the switch and will extend the life of the DC switch.
DC
Switch
DC / AC
Converter
Circuit
LC
Filter
Output
EMI
Filter
L
Filter
AC SPD
L1
L2
L3
PE
AC Relay
PV1+
PV1-
PV2+
PV2-
PV4+
PV4-
PV3+
PV3-
Input
EMI
Filter
MPPT
Circuit 1
DC
SPD
Input
EMI
Filter
MPPT
Circuit 2
DC
SPD
Input
EMI
Filter
MPPT
Circuit 3
DC
SPD
Input
EMI
Filter
MPPT
Circuit 4
DC
SPD
GW70KHV-MT / GW80KBF-MT main circuit.
DC
Switch
DC / AC
Converter
Circuit
LC
Filter
Output
EMI
Filter
L
Filter
AC SPD
L1
L2
L3
PE
AC Relay
PV1+
PV1-
Input
EMI
Filter
MPPT
Circuit 1
DC
SPD
PV2+
PV2-
Input
EMI
Filter
MPPT
Circuit 2
DC
SPD
PV3+
PV3-
Input
EMI
Filter
MPPT
Circuit 3
DC
SPD
PV4+
PV4-
Input
EMI
Filter
MPPT
Circuit 4
DC
SPD
GW80KHV-MT main circuit.
DC
Switch
DC / AC
Converter
Circuit
LCL
Filter
AC
EMI
Filter
AC SPD
L1
L2
L3
N
PE
AC Relay
PV1+
PV1-
PV2+
PV2-
PV4+
PV4-
PV3+
PV3-
Input
EMI
Filter
MPPT
Circuit 1
DC
SPD
Input
EMI
Filter
MPPT
Circuit 2
DC
SPD
Input
EMI
Filter
MPPT
Circuit 3
DC
SPD
Input
EMI
Filter
MPPT
Circuit 4
DC
SPD
GW50KLV-MT / GW75KW-MT / GW80K-MT PV3 main circuit.
DC
Switch
DC / AC
Converter
Circuit
LCL
Filter
AC
EMI
Filter
AC SPD
L1
L2
L3
N
PE
AC Relay
PV1+
PV1-
PV2+
PV2-
PV4+
PV4-
PV3+
PV3-
Input
EMI
Filter
MPPT
Circuit 1
DC
SPD
Input
EMI
Filter
MPPT
Circuit 2
DC
SPD
Input
EMI
Filter
MPPT
Circuit 3
DC
SPD
Input
EMI
Filter
MPPT
Circuit 4
DC
SPD
GW50KLV-MT / GW75KW-MT / GW80K-MT PV4 main circuit.
39 40

Goodwe MT series Specifications

General

Brand	Goodwe
Model	MT series
Category	Inverter
Language	English