Panamax max 1500 doesn't work

By look at the M1500-ups there two bottom at your left side.. one is the power bottom and the 2nd is test switch. choice 2nd one the test switch it can restart the ups.. but for what i seen that it would solve the problem becoz it might not solve it as the indicator show is over voltage.. it came from the input source.. the UPS it self has automatic regulating the input source into constant output of conitinous AC source to ur equipments.. try to reduce ur load from the output outlet from the UPS..so as that it can resolve the over voltage from the front panel... and also check the circuit breaker for the over load protection from the outlet it a round and red small buttom check if it iz blown... another thing is that if all this menthod still not solve.. that will be the hardware problem could be i/p filter, MOV, MOfset or the driver from the battery converter... well if u not sure ask ur vendor to come and check the unit...