Model 401 & 403 Pass-Thru
Service and Installation Instructions
99-21972-S001 Rev. C
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1
PROBLEM / ISSUE
PROBABLE CAUSES / FIXES
FINAL REMEDY
Glass condensation
No Power
Check power supply
Check humidity controller
Check Hinge Pin connections
Check glass wire connections
Check Hinge Pin wiring
Low voltage
Check main voltage
Check humidity controller
Door/Frame Rail Condensation
No Power
Check power supply
Check humidity controller
Check hinge pin connections
Check door wire connections
Check frame wire connections
Low voltage
Check main voltage
Check humidity controller hinge pin
Door seal malfunction
Check gasket
Check door mount wiring
Door saw-toothed
Door or frame not square
Square door to 1/16”
Adjust TorqueMaster sag
Replace worn hinge pin socket
Facility or case not level
Frame not properly shimmed
Hold-open binding/damaged
Lamp inoperative
Power switch OFF
Turn power switch ON
Lamp burned-out
Replace lamp
Lamp failure
Check socket mounting
Check socket/lamp connection
Check ground wire connection
Incorrect lamp
Replace with correct lamp
Ballast failure
Check wire connections
Replace ballast
Incorrect ballast
Replace ballast
Incorrect wiring
Check ground wire connection
Reconfigure wiring
Replace wiring
Lamp intermittent or dimming
Incorrect voltage
Match lamp voltage to circuit
Match ballast to circuit voltage
Lamp cover failure
Check cover installation
Check mullion lens installation
Replace lamp cover
Defective wiring
Check & replace wiring
Defective LED Fixture
Replace LED Fixture