Enviro HL SERIES User Manual

ENVIRO-TEC
44
FORM ET115.24-NOM11 (118)
COOLING SYSTEM TROUBLESHOOTING GUIDELINES
Problem Possible cause Corrective action
Insucient
cooling
Insucient airow Verify proper airow.
Dirty water coil Check cleanliness of water coil. Clean as needed.
[24V units] Drain pan float
switch fault
Verify operation of drain pan float switch, if present.
Disonnect switch and use volt-ohm meter to verify continuity
of switch and of wiring. Replace switch if faulty.
Cooling valve not operating
properly
Verify cooling valve opens with call for cooling. Verify all
manual valves are open.
Insucient ow Verify liquid ow per system design.
Obstructed coil
Verify coil is unobstructed. Verify all manual valves are
open and have liquid ow through system.
[DX coils] Improper refrigerant
charge
Charge to proper cooling.
[DX coils] Insucient cooling
liquid to coil
Verify coolant ow in coil. Verify proper ow per system
design.
No call for cooling.
Verify cooling signal at 'Y' terminals. Verify thermostat
setting/operation.
Unit sweats
Air leak in ducts/unit Verify integrity of unit. Verify ducts are properly sealed.
Pipe insulation Verify pipes are properly insulated
Damaged insulation Verify insulation at point of sweating
Unconditioned air to unit Verify conditioned air to unit
Drain pan is clogged Locate and remove blockage.

Enviro HL SERIES Specifications

General

Brand	Enviro
Model	HL SERIES
Category	Fan
Language	English