Fault Code 9 – Flow Switch Error / Water Pump - Carrier 30AWH004HB Service Manual

Fault code 9 – Flow Switch error / Water Pump
Perform air vent
YES
Excess air noise comes from
inside the pump
Chattering noise comes from
flow switch
Pump stops 2-3 minutes after
its rotation started
TR sensor characteristic is correct
SM_30AW.indd 79
NO
Flow switch is
Pump rotates
connected to board
YES
Built-in pump is
connected to board
NO
Flow switch is
normal
YES
NO
YES
NO
Flow shortage
YES
F o l w s w t i h c s i n r o m l a
YES
Check G.M.C. Board –
replace if defective
NO
YES
NO
YES
NO
YES
Dirt clogging inside
water circuit
12 meters or longer water
pipe to a branch, or 5 or
less branches
NO
Replace TR sensor
NO
A a t t h c
79
Diagnostic
Connect flow switch
connector to board
Connect pump
connector to board
Replace flow switch
Replace pump
Remove waste
Fit buffer tank and
the second pump
o r r p e a l e c l f ow switch
6
30AW
14-03-2011 14:45:31