Installation Manual

Page 54

Operation

5.3.4.1 Stacking Fault Messages

A fault condition may occur when multiple inverters are connected or stacked together.

• StackClock – There is a stacker cable problem; or, one inverter is losing synchronization with

the other inverter.

Remedy: Ensure you are using the correct stacking cable (the cable for stacking is not

a telephone/data cable, it is a custom made cable). Unplug and inspect the stacking

cable, and then reconnect both ends (listen and make sure you hear an audible “click”

from the connectors at both inverters).

Info: This fault has been known to occur when a Magnum Energy accessory is plugged

into the Stack Port, but the installation is not using multiple inverters in a stacked

conﬁ guration. If this occurs, perform an inverter reset (see Section 6.2).

• Stack Mode – A problem with the “other” stacked inverter has been detected. Check that

unit for a fault condition.

Remedy: This fault will automatically clear when the fault with the other inverter is

corrected.

• StackPhase – Either: 1) The AC input wiring is incorrect; 2) One phase was lost from the AC

input source; 3) One of the inverter’s internal transfer relays is bad; or, 4) The inverter’s AC input

circuit breaker may be open.

Remedy: If this fault doesn’t clear after checking these four recommendations, perform

an inverter reset (see Section 6.2).

5.3.4.2 Internal Fault Messages

The inverter continually monitors several internal components. If a condition inside the inverter

occurs that does not allow proper operation, one of the following internal fault messages displays

and the inverter shuts down to help protect itself.

Remedy: If one of the following internal faults occurs, the inverter will require an

inverter or power reset to clear the fault. See Sections 6.2 & 6.3 to perform an inverter

or power reset. After resetting the inverter, press the ON/OFF INVERTER pushbutton

on the remote to turn the inverter on and then verify that the fault has cleared (i.e.,

manual restart). If the internal fault remains or returns, the inverter will require repair

at an Magnum Energy Authorized Service Center. For service center locations see

http://magnumenergy.com/authorized-service-centers/.

• Internal Bridge – This fault message displays when the FET bridge shuts down after the

inverter has been inverting—the inverter output circuit can no longer detect any AC output volt-

age or current.

• Internal Charger – This fault message displays when the FET bridge shuts down because

the charger circuit is trying to provide maximum current, but is not detecting a current or voltage

rise to the battery bank.

• Internal NTC – This fault message displays when the internal NTC (Negative Tempera-

ture Coefﬁ cient) temperature sensor suddenly causes a very large but unexpected temperature

change.

• Internal Relay – This fault message displays when the internal AC transfer relay is not

closed while charging.