10
System stopped:
Error:
• Fuse in main board has blown, no power to unit.
• One of the fuses on the circuit board of the unit is blown.
• Loose wire, no power to unit.
• Loose wire between unit and control panel.
• Faulty or incorrectly set week program.
• High pressure switch is disengaged.
• Filter timer has switched the system off.
Condensation is running out of the unit:
Error:
• Condensation drain clogged with dirt.
• No water in the water traps.
• Clogged condensation drains due to frost. The drain is
not sufficiently protected against frost.
• Water trap has not been installed correctly.
No supply air:
Error:
• Faulty supply air fan
• Clogged supply air filter
• Clogged fresh air grill due to dirt and leaves during the
fall and snow and ice during the winter.
• Fuse on the circuit board is blown.
• The unit is in defrost mode (supply air fan stops)
• Incorrect value set in service menu item 20
No extract air:
Error:
• Faulty extract air fan
• Clogged extract air filter.
• Fuse on the circuit board is blown.
Cold supply air:
Error:
• Clogged heat changer.
• Faulty extract air fan.
• Clogged extract air filter.
• Electrical reheater is disconnected at the over heating
thermostat (only units with electrical reheater installed).
• Air in the heating pipes, faulty thermostat / motor valve,
incorrect setting of control panel.
TROUBLE-SHOOTING
