Maintenance and Troubleshooting HyPower-Geko
128 FläktGroup DC-2014-0022-GB 2018-05/R5 • Subject to modifications
8.5 Breakdowns
Deviations from normal operating conditions of the fan coil unit indicate malfunctions
that must be investigated by the maintenance personnel.
The following table should serve as a starting point for maintenance personnel regard-
ing possible causes of malfunctions and their remedy.
Fault Possible cause Action/remedy
Fan fails to start Unit not switched on Switch unit on
No mains voltage Check fuse/circuit breaker/power supply
(technical personnel only)
Electric lines are not connected Connect electrical pipes
(technical personnel only)
Faulty unit fuse Replace fuses
(technical personnel only)
Controller deactivates fan after room tempera-
ture is reached
See operation manual MATRIX control panels
Fan fails to start
OP3x/ yellow LED
OP4C “Ext” lights
OP5x: "R" in the display
Input window contact is activated Deactivate input – see “Connection function in-
puts and outputs” on page 63
Unit too noisy Unit running at too high RPM Set a lower RPM
Air intake or discharge areas blocked Clear discharge/air intake of obstructions or
bends
Noisy fan bearings Replace faulty fan
(technical personnel only)
Filter is dirty Clean/replace filter
Unit fails to heat/heats insuffi-
ciently
(pumped warm water)
Fan not switched on Switch on fan
Air volume flow of unit too low Select higher speed
Air intake or discharge areas blocked Clear or clean air flow paths
Fan blocked/faulty Examine fan, replace if necessary
(technical personnel only); also see page 97
Filter is dirty Exchange filter
Heating medium is not hot Switch on the heating system (boiler)
Switch on the circulating pump
Vent the unit
Unit fails to heat/heats insuffi-
ciently
(pumped warm water)
Water flow rate too low Check pump capacity
(technical personnel only)
Check pipe run balance and adjust using calcu-
lated pressure drop (technical personnel only)
Low temperature setpoint selected on control
panel
Adjust higher setpoint temperature at the con-
troller
Control panel is located above a heat source or
exposed to direct sunshine
Place control panel in appropriate position
(technical personnel only)
Control valve fails to open Replace faulty control valve (technical person-
nel only)
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