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NON RETURN VALVE (See TROUBLESHOOTING)
PRIOR TO ANY OPERATION SET THE PRESSURE SWITCH TO THE OFF POSITION,
PULL OUT THE PLUG AND COMPLETELY DRAIN THE RESERVOIR
Check valve does not perform its function correctly due to wear or dirt on the seal.
Unscrew the hex-shaped head of the check valve, clean the housing and the special rubber disk (replace if
worn). Re-assembler and tighten carefully.
Q
MAINTENANCE
58
GB
R
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