Hussmann Q3-DV Installation & Operation Manual page 34

Problem
Water has pooled
under case.
Case is not draining
properly.
Frost or ice on
evaporator coil.
Lights do not come
on.
Rear sliding doors
difficult to
Open or Close.
Troubleshoo• ng
Possible Cause
Case drain is clogged.
PVC drains under case
may have a leak.
Case tub has unsealed
opening.
If the case is in a line-
up, case to case joint is
missing or unsealed.
Evaporator pan is
overfl owing (if applicable).
Case is not level.
Drain screen is plugged.
Drain or P-trap is clogged. Clear any debris.
Evaporator fans are not
functioning.
Defrost clock is not
functioning.
Coil is freezing over.
LED Driver/light socket
wiring.
Driver needs to be
replaced.
Lamp socket needs to be
replaced.
Lamp needs to be
replaced.
Light Switch needs to
replaced.
Obstruction / Debris on Door
Track
Excessive friction between
door glide and track
Possible Solution
Clear drain.
Repair as needed.
Seal as needed.
Install case to case joint and seal as needed.
Check electrical connection to evaporator pan. Check fl oat
assembly, it should move freely up and down the support
stem. Clear any debris.
Level the case.
Clean drain screen and remove any debris.
Check electrical connections.
Case should be serviced by a qualifi ed service technician.
Return air is blocked, make sure debris is not blocking the
intake section.
Coil close-offs are not installed. Inspect coil to make sure
these parts are on the case.
Check electrical connections. See Electrical Section and
check wiring diagram.
Case should be serviced by a qualifi ed service technician.
See Electrical Section.
Case should be serviced by a qualifi ed service technician.
See Maintenance Section.
Case should be serviced by a qualifi ed service technician.
Clean door and tracks. Refer to "Rear Sliding Doors Cleaning" in
the Maintenance Section
Lubricate door tracks using recommended lubricant. Refer to "Rear
Sliding Doors Cleaning" in the Maintenance Section