NORMAL MAINTENANCE | TROUBLESHOOTING | ||||||
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Prior to any of the following maintenance proce- dures, shut off all power to the unit to prevent per- sonal injury.
Periodic maintenance normally consists of chang- ing or cleaning filters.
GENERAL
FILTERS
Inspect once a month. Replace disposable or clean perma- nent type as necessary. DO NOT replace permanent type with disposable.
MOTORS
Indoor fan and outdoor fan motors are permanently lubricated and require no maintenance.
OUTDOOR COIL
Dirt should not be allowed to accumulate on the outdoor coil surface or other parts in the air circuit. Cleaning should be as often as necessary to keep coil clean. Use a brush, vacuum cleaner attachment, or other suitable means. If water is used to clean coil, be sure power to the unit is shut off prior to cleaning. Service access is provided in the front and rear condenser compartment panels to provide improved access
to the condenser coils.
Do not remove service panels or attempt to clean the interior of the condenser section when the unit is powered and/or operating. Shut off all power to the unit prior to cleaning or maintenance of the condenser section internals.
NOTE: Exercise care when cleaning the coil so that the coil fins are not damaged. Do not permit the outdoor air discharge to be obstructed by overhanging struc- tures of shrubs.
Troubleshooting of components may require open- ing the electrical control box with the power con-
nected to the unit. Use extreme care when
working with live circuits! Check the unit name- plate for the correct line voltage and set the voltme- ter to the correct range before making any connections with line terminals.
When not necessary, shut off all electric power to the unit prior to any of the following maintenance proce- dures so as to prevent personal injury.
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dan- gerous operation which could cause injury to person and/or damage unit components. Verify proper oper- ation after servicing.
PREDATOR® FLASH CODES
Various flash codes are utilized by the unit control board (UCB) to aid troubleshooting. Flash codes are distinguished by the short on and off cycle used (approximately 200ms on and 200ms off). To show normal operation, the control board flashes a 1 second on, 1 second off “heartbeat” during normal operation. This is to verify that the UCB is functioning cor- rectly. Do not confuse this with an error flash code. To prevent confusion, a
Current alarms are flashed on the UCB LED. The alarm his- tory can be checked by pressing and releasing the ALARMS button on the UCB. The UCB will cycle through the last five
(5)alarms, most recent to oldest, separating each alarm flash code by approximately 2 seconds.
In some cases, it may be necessary to “zero” the ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and release the UCB TEST button once.
Unitary Products Group | 39 |