Liebert 83 사용자 설명서

Condenser will not start

No power to condenser

Check voltage at input terminal block

Circuit breaker for low voltage 

transformer in condenser is tripped

Locate problem in condenser electrical 

panel and repair

No low voltage signal to/from indoor unit Locate open circuit and repair

Low indoor unit

suction pressure

Insufficient refrigerant in system

Check for leaks, repair, and add refrigerant

Fan-cycling ambient thermostats

setpoints too low

Check schematic for recommended 

setpoints and adjust.

Low discharge pressure

Faulty head pressure control valve

or condenser FSC/VFD control

Replace if defective

High discharge pressure

Dirty condenser fins

Clean coil

Condenser fans not operating

Check for low voltage signal from indoor unit
Check fan motors and fuses
Check for correct ambient thermostat 

setpoints, as applicable.

High refrigerant charge

Check refrigerant charge

VFD Condenser trips out 

on overvoltage

(OU displayed on VFD 

controller)

Supply voltage is Delta configuration

or is ungrounded/high impedance

Shut off AC voltage, locate the VFD, pull out 

the EMC tab and reconnect power

TVSS indicator lights are 

extinguished or red LED is 

illuminated and monitoring 

terminals 11/12 are closed

No voltage or improper phasing exists

at condenser

Check voltage at input terminal block

Electrical connections to TVSS are 

faulty

Locate connection problem and repair

A surge exceeding the rating

of the TVSS has occurred

Replace TVSS and inspect other 

components for damage and replace them if 

necessary