Poweramp POWERHOLD 4.2009 - Manual (Page 34)

Symptom Possible Cause Solution
Restraint will not lower
to release truck. Solenoid staying energized. Relay or PLC contact is stuck contacts. Test coil for
Magnetism (see page 40,41). Coil must be de-
energized to release the truck.
Bad Spool Valve. Remove coil from cartridge valve and cartridge valve
from valve block.
-Check valve for contaminant's and/or damage.
-Replace valve if damaged.
-Carefully wipe valve with clean rag (do not damage
“O” rings on valve).
NOTE: Do not over tighten valve into block. Max Torque:
10-15 lb/ft. or snug to prevent leakage. Tighten coil snug,
avoid over tightening and causing valve to bind.
Operate unit. Replace valve if problem persists and
all other troubleshooting procedures.
Restraint will not lower
but leveler raises.
(combination unit only) Solenoid not Energized. Locate solenoid (See Page 48).
Coil must be energized when P-Hold is in engage or
disengaged.
-Check valve for Magnetism at the coil
Bad Spool Valve Remove coil from cartridge valve and cartridge valve
from valve block.
-Check valve for contaminant's and/or damage.
-Replace valve if damaged.
Carefully wipe valve with clean rag (do not damage
“O” rings on valve.
-Check valve block for contaminant's.
-Replace valve and coil.
NOTE: Do not over tighten valve into block. Max Torque:
10-15 lb/ft. or snug to prevent leakage. Tighten coil snug,
avoid over tightening and causing valve to bind.
Operate unit. Replace valve if problem persists and
all other troubleshooting procedures performed.
TROUBLE SHOOTING POWERHOLD
4111-0016 — November,2008 32