Enviro VDD User Manual

ENVIRO-TEC
24
FORM ET115.24-NOM12 (718)
EC MOTOR TROUBLESHOOTING GUIDELINES
For EC Motor troubleshooting questions please refer to the “EC Motor Solo, Select, and Sync PWM IOM, All
Products” document found under the IOM Literature section of www.enviro-tec.com..
COOLING SYSTEM TROUBLESHOOTING GUIDELINES
Problem Possible cause Corrective action
Insufcient
cooling
Insufcient airow Verify proper airow.
Dirty water coil Check cleanliness of water coil. Clean as needed.
Drain pan oat switch fault
Verify operation of drain pan float switch, if present.
Disconnect 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.
Insuf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] Insuf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.
SECTION FIVE - TROUBLESHOOTING

Enviro VDD Specifications

General

Brand	Enviro
Model	VDD
Category	Fan
Language	English