ARI Armaturen TEMPTROL 774 EN - Manual (Page 15)

Rev. 0040702000 1011 Page 33
Operating and installation instructions
TEMPTROL
®
8.0 Troubleshooting
In the event of malfunction or faulty operating performance check that the installation and
adjustment work has been carried out and completed in accordance with these Operating
Instructions.
If malfunctions cannot be eliminate with the help of the following table
“9.0 Troubleshooting table”, the supplier or manufacturer should be consulted.
9.0 Troubleshooting table
-
ATTENTION !
It is essential that the safety regulations are observed when identifying faults.
ATTENTION !
- read item 10.0 and 11.0 prior to dismantling and repair work !
- read item 5.0 and 6.0 before restarting the plant !
Fault Possible cause Corrective measures
No flow Valve closed
(manual control device) Bring manual control device in com-
plete open position
Flange covers not removed Remove flange covers
Flow to small Valve not sufficiently open
(manual control device) Bring manual control device in com-
plete open position
Dirt sieve clogged Clean / replace sieve
Piping system clogged Check piping system
Thermal closing valve:
Flow to large, no temper-
ature regulation possible Leaky capillary tube system Change the thermal control device
mounted against the allowed flow
direction Mount valve in the correct flow direc-
tion
Thermal opening valve:
Flow to small, no temper-
ature regulation possible Leaky capillary tube system Change the thermal control device
mounted against the allowed flow
direction Mount valve in the correct flow direc-
tion
Thermal mixing/diverting
valve:
no or inadequate mixing
or diverting function Leaky capillary tube system Change the thermal control device
mounted against the allowed flow
direction Mount valve in the correct flow direc-
tion