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WA900-3EO
FAULT DIAGNOSIS - PRESSURISER
FAULT DIAGNOSIS - PRESSURISER
NOTE: This section is written on the assumption
that the service mechanic is a qualified trades
person in refrigeration and air conditioning.
They must have a good understanding of the
systems operation prior to fault diagnosis and
repairs
(If in doubt please ask)
.
THE UNIT WILL NOT START OR IS PERFORMING POORLY:
1. Check main circuit breaker or power fuse supply. Make sure the
motor is receiving the correct power supply & that it is main-
tained once the machine is running.
2. If the unit uses a motor with serviceable brush’s. Check brush
con- dition and for any dust build up in the brush holders.
POOR PERFORMANCE
1. Is the Primary lter serviceable.
2. Check cabin sealing. Check to see if the door & window seal are
serviceable. Ensure all boots & gaskets been retted after the
last service/repair.
3. Ensure the correct voltage motor is installed.
4. Fan wheel rotation. There are left & right handed fan wheels.
Ensure the correct fan wheel is installed.
DUST IN CABIN
1. Check all cabin seals and test to ensure positive cabin pressuri-
sation is been achieved, and maintained at a minimum of 25Pa
above ambient pressure.
FAULT DIAGNOSIS
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