Maintenance Worksheet
39
Liebert
®
Challenger 3000
™
BLOWER SECTION (EC Fan) (If Equipped)
___ 1. Mounting bolts tight
___ 2. Fan guard bolts tight
___ 3. Impeller spins freely
___ 4. Check/test air sail switch (if equipped)
___ 8. Compare to nameplate amps
REHEAT (If Equipped)
___ 1. Inspect elements
___ 2. Check/retorque wire connections (inside reheat box)
STEAM GENERATING HUMIDIFIER (If Equipped)
___ 1. Check drain valve/drain lines/trap for clogs
___ 2. Check water fill valve and all hoses for leaks
___ 3. Check condition of steam hose
___ 4. Clean strainer
___ 5. Replace humidifier bottle if necessary
___ 6. Check operation of humidifier
INFRARED HUMIDIFIER (If Equipped)
___ 1. Check drain lines and trap for clogs/leaks
___ 2. Check/clean pan for mineral deposits
___ 3. Clean reflector
___ 4. Check water make-up valve for leaks
___ 5. Check humidifier lamps (replace if burnt out)
___ 6. Check/retorque wire connections (inside humidifier box)
___ 7. Check humidifier high water alarm operation
CONDENSATE PUMP (If Equipped)
___ 1. Check for debris in sump.
___ 2. check operation of float(s) (free movement)
___ 3. Check/clean discharge check valve
ELECTRICAL PANEL
___ 1. Check fuses
___ 2. Check contactors for pitting
___ 3. Check/retorque wire connections
___ 5. Motor #1 amp draw
L1
L2
L3
___ 6. Motor #2 amp draw
L1
L2
L3
___ 7. Motor #3 amp draw
L1
L2
L3
___ 3. Reheat amp draw
#1
# 2
#3
___ 7. Humidifier amp draw
L1
L2
L3
___ 8. Humidifier amp draw
L1
L2
L3
FOR
HISTORICAL
USE
ONLY
