8-2.Compressor No Start - Haier HRFZ-250DAA Service Manual

SERVICE MANUAL
Model: HRFZ-250DAA
.

8-2.Compressor no start

Compressor no working
Check if the home power
is connecter
YES
Check if thermostat is set
at "0"
NO
Check if the thermostat is
normal
YES
Check if the starter is
normal?
YES
Check if the overload
protector is normal?
YES
Check if the run capacitor is
normal?
YES
NO
Connect the power
Adjust thermostat setting position
YES
Ambient temperature >25℃ MIN-NORMAL Grade
Ambient temperature <25℃ NORMAL-MAX Grade
Test if the thermostat is normal under power on status:
Method-1: Setting thermostat to coldest position (5 grade), observe if the machine can be
started. If compressor still not start, it means that the thermostat maybe failure.
Method-2: Turn on the fast freeze switch, and check if the compressor could start, if it can
start, means the thermostat defective, please exchange it ,and if it can not start ,it need to
be next step check.
1. PTC. Test if resistance of PTC starter is 6.8+20/-20%Ω.If so, it means it is normal, and if it
is ZERO or INFINITE, means the starter is out of work. For PTC starter, when shake it, it
should not have noise, if it has, means the starter Magnetic Disk burned.
2. Reverse180 °of hammer-type starter, and if it does not conduct, contact junction
carbonized and check the coil burn .
1.
Measure whether two ends of overload protector is through using
multi meter Ohm grade. Not thorough means protector is defective.
2. Measure starting current and running current of compressor using
clamp-type tester. If overload protector act when current is normal,
means protector failure and should be replaced.
Before measurement, remove the capacitor from circuit firstly, and
then connect two terminals for discharge.
1. IF the finger of multimeter swings to 0 quickly and then swings
back slowly when measuring two poles of capacitor, it means the run
capacitor is normal.
2. If the finger of multimeter does not swing, it means the run
capacitor is open circuit. If the finger of mlimeter swings to 0 and stops
means it is short circuit, if it stops on any other position, it means the
ge.
capacitor leaka
Issue 2012-4-9
Rev. Ref0911S006V0
Compressor
NOT
accessories
NORMAL
failure
Compressor
NOT
accessories
NORMAL
failure
20