Maintenance, Servicing; Overview Of Malfunctions - ITT A 402 Serie Instructions D'installation Et D'entretien

A_AD 16.05.2007
61
ssage
function
Malfunction
Pump not running
Short circuit
when pump is switched on
Pump makes noise
Heating elements are not hot
8:22 Uhr Seite 61
english

7. Maintenance, servicing

Mind the operating instructions.
Only perform this work when the system is at standstill.
Take the pump off power.
Switch off the fuse and put on warning signs.
The media in the system may scald you.
The hot surfaces may scald you.

8. Overview of malfunctions

Cause
Pump blocked
No supply voltage
Supply voltage too low
Electronics defective
Motor incorrectly connected
Motor coil defective
Air in pump
Cavitation
Pump too great
Pump too weak
Air in pump
Subject to change without notice
Before performing maintenance on the pump,
make sure that the pump is taken out of operation,
disconnect all poles from the power grid, and secure
from switching on again.
Only have trained staff do this work.
The supply voltage must be switched off on all poles
before the cover for the terminal box is removed
and the pump disassembled.
Remedy
Deblock
See section 6.5
Check switches and fuses
Check voltage at pump
Check supply voltage
Exchange electronics
Connect correctly
Exchange motor coil
Exchange motor coil
De-aerate system and pump,
See section 6.3
Increase system pressure/
reduce temperature
Lower electric stage/
adjust turning knob
select lower pump
Switch on power limitation,
see point 5.3 SWITCH «1»
De-aerate system and pump,
See section 6.3