Troubleshooting; Indoor Unit Error Display - Toyotomi TPN A128 IVP Service Manual

9. Troubleshooting

9.1 Indoor Unit Error Display

Operation lamp Timer lamp
☆ 1 time
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 1 times
☆ 2 times
☆ 5 times
Display
X E0
X E1
X E2
X E3
X E4
X E5
X EC
O F1
O F2
O F3
O F4
O F5
☆
P0
☆
P1
☆
P4
O （ light ）
LED STATUS
Indoor unit EEPROM parameter error
Indoor / outdoor units communication error
Zero crossing detection error(except
MSR1-24HRDN1-QRC4W)
Indoor fan speed has been out of control
Open circuit or short circuit of indoor room temperature T1
sensor
Open circuit or short circuit of evaporator coil temperature
T2 sensor
Refrigerant Leakage Detection
Open circuit or short circuit of outdoor ambient T4
temperature sensor
Open circuit or short circuit of condenser coil temperature
T3 sensor
Open circuit or short circuit of compressor discharge T5
temperature sensor
Outdoor unit EEPROM parameter error
Outdoor fan speed has been out of control
IPM malfunction or IGBT over-strong current protection
Over voltage or over low voltage protection
Inverter compressor drive error
X （ off ） ☆（ flash ）
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