Troubleshooting; Inverter Board Fault Codes - Daikin MicroTech III DPS Installation And Maintenance Manual

Inverter Board Fault Codes

MicroTech III communicates with the fan and compressor
inverter boards via Modbus . If the inverter boards detect
an unsafe condition they issue the appropriate control
commands and an error code can be read at the MicroTech III
display as follows:
• Go to Main menu – Alarm lists – Active alarms – Alarm
details - INV/OF Flt Code Details
• The error code is shown at "INVAlarmCode" and the error
description is shown at "Code text" as shown in
17 .
Possible Inverter Compressor fault codes are listed in
below:
Table 71: Rebel Inverter Compressor Fault Codes
Fault
HMI Code Text
Code
E5 Compressor Lock
L1 Current Sensor Alm
L1 DC Cur Sensor Alm
L1 EEPROM Setup Problem
L1 IGBT Problem
L1 JP Setup Problem
L1 Momntry Ovrcurrent
L4 Fin Temp Rise
L5 Momntry Ovrcur (DC)
L8 Elec Therm (Cur1)
L8 Elec Therm (Cur2)
L8 Elec Therm (Step)
L8 Elec Therm (Surge)
L8 Time Lag Ovr Current
L9 Stall Prevent (Strt)
P1 Pwr Sup Imbalance
P4 Fin Temp Sensor Alm
PJ Model Setup Problem
U2 Phase Pwr Loss
U2 PN Short Circuit Alm
U2 Pwr Sup Insufficient
Possible outdoor fan fault codes are listed in
Table 72: Rebel Outdoor Fan Fault Codes
Fault
HMI Code Text
Code
E7 IPM Prot Active
E7 Momntry Ovrcurrent
E7 Motor Lock
H7 Motor Alarm
L1 EEPROM Problem
L1 EEPROM Setup Problem
L1 JP Setup Problem
L4 Fin Temp Rise
P4 Fin Temp Sensor Alm
PJ Model Setup Problem
U2 Pwr Sup Voltage Alm
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Figure
Table 71
Extended Text
Compressor Locked
Current Sensor Alarm
DC Current Sensor Alarm
EEPROM Setup Problem
Insulated Gate Bipolar Transistor Problem
LP Setup Problem
Momentary Over Current
Fin Temperature Rise
Momentary DC Over Current
Electrical Thermal (Current 1)
Electrical Thermal (Current 2)
Electrical Thermal (Out of Step)
Electrical Thermal (Surge)
Time Lag Over Current
Startup Prevention (Startup)
Power Supply Imbalance
Fin Temperature Sensor Alarm
Model Setup Problem
Phase Power Loss
PN Electrical Short Circuit Alarm
Power Supply Insufficient
Table 72 below .
Extended Text
IPM Protection Active
Momentary Over Current
Motor Locked
Motor Alarm
EEPROM Problem
EEPROM Setup Problem
JP Setup Problem
Fin Temperature Rise
Fin Temperature Sensor Alarm
Model Setup Problem
Power Supply Voltage Alarm
Detailed description and diagnostic instructions are shown on
the following pages .
Figure 17: Inverter Board Fault Codes
Fault Code Details
ACTIVE FAULT CODES
INVAlarmCode=______
Code Text
OF1AlarmCode=_______
Code Text
OF2AlarmCode=_______
Code Text
PREVIOUS FAULT CODES
PrvINVAlmCode=_______
Code Text
MM/DD/YYYY HH:MM:SS
PrvOF1AlmCode=______
Code Text
MM/DD/YYYY HH:MM:SS
PrvOF2AlmCode=______
Code Text
MM/DD/YYYY HH:MM:SS
69 OM 1263 • MICROTECH UNIT CONTROLLER

Troubleshooting

Troubleshooting