16 Operating Instructions
5 FAULT DIAGNOSIS
(parts are identifi ed on wiring diagram)
Fault Possible cause Repairment
Unit does not start
No power supply Test power supply
Broken main fuse Replace main fuse
Transformer fuse broken Replace transformer fuse
Temperature controller Replace temperature
broken controller
Fluid temperature Testing of correct
outside min. or max. temperature setting
allowable values
Fluid (water, oil)
temp. too high Clogged or dirty air fi lter Replace air fi lter
Dirty evaporator Clean evaporator
Dirty condensor Clean condensor
Refrigerant leakage Repairement only by
(bubbles in sight glass) refrigeration specialist
Temp.controller setting Re-adjustment of temp.
incorrect controller
Water level in tank too low Testing of waterlevel
refi lling of tank
Ambient temp. too high Refer to technical
specifi cation or chapter 3
Consumer capacity too high Test consumer capacity and
compare with chiller capacity
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