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)