AIREDALE CR12 - Page 33

FAULT POSSIBLE CAUSE REMEDY / ACTION
Unit will not start
No power Check power supply to the controller
Wired incorrectly
Check wire connections in accordance
with wiring diagram on control box lid
Loose wires
Check all wires, connections,
terminals etc
Head pressure too high
Condenser coil clogged or dirty Clean condenser
Overcharge of refrigerant, normally
troublesome in warm weather
Reclaim excess refrigerant from
system
Air or other non-condensable gas in
system
Evacuate system and re-charge with
new refrigerant
Head pressure controller faulty Refer to Indoor unit
Fan not operating or operating
ine󰀩ciently
Refer to Indoor unit
Head pressure too low
Fan operating too fast in low ambient
conditions
Refer to Indoor unit
Condenser fan not operating - power
on
Power supply failure Check power supply at circuit breaker
Wiring to motor Check voltage at motor terminals
Motor / fan assembly jammed
Isolate unit and check free rotation of
motor/fan assembly, if faulty - replace
Motor internal overheat protector
tripped
Carry out continuity check at terminals
“TK” in motor terminal box, if tripped
and motor hot - check bearings, if
tripped and motor cold - replace motor
Faulty motor windings/capacitor
Motor humming would indicate fault in
motor or capacitor, check windings for
continuity and if OK replace capacitor
Minimum speed set too low Refer to Indoor unit
Faulty pressure sensor
Check electrical connections are
secure at controller and pressure
sensor, replace controller and sensor
(as they are matched sets)
Faulty fan speed controller Refer to Indoor unit
Condenser fan runs too fast
High ambient condition or excessive
re-circulation of air around condenser
coil
Check installation against design
Minimum set speed setting incorrect Adjust as necessary
Incorrect pressure sensor setting Adjust sensor screw as necessary
Faulty fan speed controller Refer to Indoor unit
Faulty pressure sensor Refer to Indoor unit
Condenser fans runs only slowly
Incorrect pressure setting Adjust sensor screw as necessary
Faulty fan speed controller Refer to Indoor unit
Faulty pressure sensor Refer to Indoor unit
Motor/capacitor faulty Replace
Troubleshooting
CR12 - CR165 50/60HzCONDENSERS
33
Condenser Technical Manual 6666879 V2_02_2020
Technical