Faultfinding; Introduction - Dantherm DanX XWPRS Series User Manual

6. FAULTFINDING

6. F aultfind ing

6.1 Introduction

Normally an operation fault will give an alarm in the display of the control panel. The alarm
messages may be named differently. For details, please refer to the manual of the control
panel.
If the frequency inverter for the fan is showing an alarm, please refer to the manual of the
frequency inverter.
6.2 Fault finding
Alarm
Frost
2)
Fire
Filter
Fan
HP/ LP
Compressor
Problem
Valve not opening
1)
No hot water
Return air
temperature > 40°C
Supply air
temperature > 70°C
Filter is dirty
Frequency inverter
3)
switched off
HP pressure over
24 bar
4)
LP pressure under
1.5 bar
Thermo relay
switched off
Cause
• Defect actuator
• Valve stuck
• Pump not working
• Boiler problem
• Fire in the building
• After heating coil not
working correct at low
air volume
• Fire in the unit
• Filter blocked
• Fan motor overload
• Fan motor broken
• Phase missing
• Air volume too small
• Blockage in cooling
circuit
• Outside temperature too
high
• Leakage in the cooling
circuit
• Evaporator iced up
• Compressor broken
• Phase missing
• Thermo relay broken
28
Action
• Change/Repair actuator
• Change/Repair valve
• Change/Repair pump
• See boiler manual
• Check heating coil controls
• Change filter
• Check air volume/pressure
• Change/repair motor
• Connect all phases correct
• Check air volume
• Check/repair cooling
circuit
• Reset pressure switch
• Repair cooling circuit
• De-ice evaporator/check
de-icing function
• Change compressor
• Connect all phases correct
• Change thermo relay