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6. Troubleshooting
6.1 Lamp flashes
No.
Operation lamp
★
1
★
2
★
3
★
4
Note: ●：Light, ○：Extinguish, ☆：Slow flash, ★：Quick flash
ERVD010, ERVD015, ERVD020, ERVD030, ERVD050, ERVD060
ERVB090, ERVB120
T1 temperature sensor: site at the return air cavity.
T4 temperature sensor: site at the outdoor air inlet cavity.
Timerlamp
Defrosting lamp
○
★
○
○
Alarmlamp
○
○
○
○
★
○
★
Explanation
T4 sensor error
T1 sensor error
Current protection
Phase absent, phase error
15
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