McQuay M5ACV 030 CR User Manual

Troubleshooting
82
When a malfunction of the unit is detected, immediately switch off the main power supply before proceeding
with the following troubleshooting procedures.
The following are common fault conditions and simple troubleshooting tips. If any other fault conditions that
are not listed occur, contact your nearest local dealer. DO NOT attempt to troubleshoot the unit by yourself.
Error Code
CONTROL MEASURE
PUMP SYSTEM1 SYSTEM 2
ERROR DISPLAY ERROR DESCRIPTION
RESET
(default)
COMP FAN COMP FAN
Phase Missing Phase missing Manual OFF OFF OFF OFF OFF
Phase Seq Error Wrong phase sequencing Manual OFF OFF OFF OFF OFF
Memory Error EEPROM read/write error Auto OFF OFF OFF OFF OFF
Entering Water sensor
Open/Short
BPHE water in sensor error Auto OFF OFF OFF OFF OFF
Leaving water sensor
Open/Short
BPHE water out sensor error Auto OFF OFF OFF OFF OFF
Outdoor Air sensor
Open/Short
Ambient temp sensor error Auto OFF OFF OFF OFF OFF
Water Flow Error Cv contact opened Manual OFF OFF OFF OFF OFF
Cool Mode Antifreeze Leaving water temp too low Auto OFF OFF OFF OFF OFF
OV/UN Voltage Comp High Voltage (>490V) <460V, Auto OFF OFF OFF OFF OFF
OV/UN Voltage Comp Low Voltage (<310V) >340V, Auto OFF OFF OFF OFF OFF
Pump Overload Pump OLP closed Auto OFF OFF OFF OFF OFF
IPM Error IPM over-current or overheat Auto - OFF OFF - -
Comp 1 Overload Comp 1 overload Auto - OFF OFF - -
Comp 1 Discharge
Overheat
Comp 1 discharge overheat Auto - OFF OFF - -
High Pressure 1 System 1 high pressure Auto - OFF OFF - -
Low Pressure 1 System 1 low pressure Auto - OFF OFF - -
Comp 1 Defrost
sensor Open/Short
Coil out system 1 sensor
error
Auto - OFF OFF - -
Comp 1 Suct sensor
Open/Short
Suction comp system 1
sensor error
Auto - OFF OFF - -
Comp 1 Discharge
sensor Open/Short
Discharge comp system 1
sensor error
Auto - OFF OFF - -
Coil 1 Inlet Temp
Open/Short
Coil In system 1 sensor error Auto - OFF OFF - -
V-Hx Inlet Temp
sensor Open/Short
BPHE refrigerant in sensor
error
Auto - OFF OFF - -
V-Hx Outlet Temp
Open/Short
BPHE refrigerant out sensor
error
Auto - OFF OFF - -
Comp 2 Overload Comp 2 overload Auto - - - OFF OFF
High Pressure 2 System 2 high pressure Auto - - - OFF OFF
Low Pressure 2 System 2 low pressure Auto - - - OFF OFF
Comp 2 Defrost
sensor Open/Short
Coil out system 2 sensor
error
Auto - - - OFF OFF
Comp 2 Discharge
sensor
Open/Short/Overheat
Discharge comp system 2
sensor error
Auto - - - OFF OFF

McQuay M5ACV 030 CR Specifications

General

Brand	McQuay
Model	M5ACV 030 CR
Category	Chiller
Language	English