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Problem 5 - Water alarm
Electric system
Electrical parts defective: 60%
Microprocessor
Flow switch
temperature sensor
Auxiliary relay in chiller control panel
Interlock: 40%
Check wiring and electric parts of interlock wiring
Water system
temperature: 40%
Leaving chilled water temperature too low: 70%
temperature control function does not work properly.
Wrong operating order.
Holding water quantity in the chiller is too low.
Entering cooling water temperature too low: 20%
Ambient temperature is too low.
Cooling water temp. control malfunctions.
Leaving hot water temperature too low: 10%
temperature control function does not work properly.
Wrong operating order.
Holding water quantity in the chiller is too low.
Flow rate: 60%
Check chilled-water flow switch
Air in water system?
Strainer in water system is clogged?.
Valves in water system opened properly?
Problem 6 - Motor alarm
Absorbent pump
Measure operating current: 60%
Crystallization or foreign material in the pump.
Pump motor is defective.
open phase: 10%
Magnetic contactor is defective.
Pump motor coil is defective.
Primary power failure.
Motor
Magnetic contactor with thermal relay.
Pump power wires
Check the setting of thermal relay: 10%
refrigerant pump
Measure operating current: 60%
overcurrent: 90%
Foreign material in the pump/Pump motor is defective.
open phase: 10%
Magnetic contactor is defective.
Pump motor coil is defective.
Primary power failure.
Measure insulation resistance: 30%
Motor
Magnetic contactor with thermal relay.
Pump power wires
Check the setting of thermal relay 10%
blower motor (16DJ only)
Measure operating current: 60%
overcurrent: 90%
Foreign material in the pump/pump motor is defective.
open phase: 10%
Magnetic contactor is defective.
Pump motor coil is defective.
Primary power failure.
Measure insulation resistance: 30%
Motor
Magnetic contactor with thermal relay.
Pump power wires
Check the setting of thermal relay 10%
NOTe: The troubleshooting charts apply to all 16 series absorption chillers, and the service engineer should determine if the
failure mode is relevant to the specific machine.
