Daikin MicroTech III DPS - Troubleshooting: Inverter Board Faults; Inverter Board Fault Code Categories

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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 Figure
17.
Possible Inverter Compressor fault codes are listed in Table 71
below:
Table 71: Rebel Inverter Compressor Fault Codes
Fault
Code
HMI Code Text Extended Text
E5 Compressor Lock Compressor Locked
L1 Current Sensor Alm Current Sensor Alarm
L1 DC Cur Sensor Alm DC Current Sensor Alarm
L1 EEPROM Setup Problem EEPROM Setup Problem
L1 IGBT Problem Insulated Gate Bipolar Transistor Problem
L1 JP Setup Problem LP Setup Problem
L1 Momntry Ovrcurrent Momentary Over Current
L4 Fin Temp Rise Fin Temperature Rise
L5 Momntry Ovrcur (DC) Momentary DC Over Current
L8 Elec Therm (Cur1) Electrical Thermal (Current 1)
L8 Elec Therm (Cur2) Electrical Thermal (Current 2)
L8 Elec Therm (Step) Electrical Thermal (Out of Step)
L8 Elec Therm (Surge) Electrical Thermal (Surge)
L8 Time Lag Ovr Current Time Lag Over Current
L9 Stall Prevent (Strt) Startup Prevention (Startup)
P1 Pwr Sup Imbalance Power Supply Imbalance
P4 Fin Temp Sensor Alm Fin Temperature Sensor Alarm
PJ Model Setup Problem Model Setup Problem
U2 Phase Pwr Loss Phase Power Loss
U2 PN Short Circuit Alm PN Electrical Short Circuit Alarm
U2 Pwr Sup Insu󰀩cient Power Supply Insu󰀩cient
Possible outdoor fan fault codes are listed in Table 72 below.
Table 72: Rebel Outdoor Fan Fault Codes
Fault
Code
HMI Code Text Extended Text
E7 IPM Prot Active IPM Protection Active
E7 Momntry Ovrcurrent Momentary Over Current
E7 Motor Lock Motor Locked
H7 Motor Alarm Motor Alarm
L1 EEPROM Problem EEPROM Problem
L1 EEPROM Setup Problem EEPROM Setup Problem
L1 JP Setup Problem JP Setup Problem
L4 Fin Temp Rise Fin Temperature Rise
P4 Fin Temp Sensor Alm Fin Temperature Sensor Alarm
PJ Model Setup Problem Model Setup Problem
U2 Pwr Sup Voltage Alm 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