AIREDALE TurboChill TCC11R04G-01, Техническое руководство

Страница: 153 / 197

Trou
ble
sh
oo
tin
g
Chillers TurboChill™ R1234ze Air Cooled and FreeCool
153
Chiller Technical Manual 7752785 V1.12.0_10_2018
(1) The water flow is reduced however the differential pressure switch may still remains healthy as the pressure would
increase.
Fault Possible Cause Remedy / Action
Condenser
Condenser fan not
operating - power on
Power supply failure. Check power supply at circuit breaker.
Wiring to motors. 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 to see if the
motor bearings have seized / fan difficult to turn.
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. Adjust head pressure controller to suit.
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 via microprocessor.
Faulty EC fan. Replace fan.
Faulty pressure sensor. Replace sensor.
Condenser fans
runs only slowly
Incorrect pressure setting. Adjust via microprocessor.
Faulty EC fan. Replace fan.
Faulty pressure sensor. Replace sensor.
Motor / capacitor faulty. Replace.
Motor wired incorrectly.
Check against wiring diagram
- correct as required.
W
aterside
Pump not operating
No power to pump.
Check isolator, fuses, MCBs, contactor
and control circuit wiring.
Inverter tripped and does not
auto reset (the microprocessor
will try and auto reset 3 times)
Reset inverter drive via microprocessor.
No water flow Strainer blocked. Clean strainer
Pump noisy
Air in water system. Purge air from water system.
Pump cavitations.
Ensure there is 0.5m NPSH suction
head to avoid cavitations.
Unit not operating
due to water pressure
sensor low limit alarm.
Low flow alarm operating.
Check that the low flow pressure
variable is set correctly. If too high the
unit may have nuisance trips.
Low temp limit alarm
Partial blockage in evaporator
causing low flow.(1)
Clean evaporator
No heatload on system Ensure heatload is avaliable for unit to operate
Water/ Glycol freezing
up (crystallizes)
Insufficient glycol / water concentration
for operating temperatures.
Check glycol concentration and add accordingly.
Troubleshooting