Advertisement
Check LED
Check Code
LED2
LED1
RED
GREEN
8
Lit
times
E6
or
None
9
Lit
times
4
4
U1
times
times
GHH15010
Abnormal point and
detection method
Abnormality of compressor
phase current
compressor current abnormality
Fan cutoff
fan motor abnormality
Excessive high pressure
of high pressure switch (HPS)
detected.
This error is canceled by
turning the earth leakage circuit
breaker of the Cylinder Unit to
"OFF". To restart the outdoor
inverter, first check that the
LEDs (red/green) of the outdoor
inverter P.C. board are out,
(this takes approx. 1 minute),
turn the earth leakage circuit
breaker to "ON" again.
Case
(1) Defective outdoor inverter
p.c. board
(1) Obstacle contacting propeller
fan
(2) Defective fan motor
a) Fan motor wiring disconnec-
tion
b) Fan motor locked
(3) Defective outdoor inverter
p.c. board
(1) Water is not being circulated
in the outdoor unit water circuit
a) Cylinder unit not filled with
water
b) Air trapped in water pipes
c) Water leakage, crushing or
blockage of water pipes
d) Isolating valve in water pipes
closed
e) Pump valve in cylinder unit
closed
f) Water pipe freezing
g) Outdoor unit gas cooler
blockage
(2) Pump1 in the cylinder unit not
operating
a) Defective pump1
b) Defective cylinder unit board
(3) Defective LEV control caused
by erroneous detection of
discharge temperature
a) Discharge temperature
thermistor (TH1) loose from
discharge pipe
b) Defective discharge tempera-
ture thermistor (TH1)
(4) Defective LEV coil
a) Loose LEV coil
b) Loose connector [CN724]
c) LEV coil disconnection
(5) High pressure switch
malfunction or erroneous
detection
a) Loose connector [CN934],
defective contact
b) Loose high pressure switch
terminal, defective contact
c) Lead wire disconnection
(6) Defective outdoor inverter p.c.
board
(7) Defective coolant circuit parts
a) Defective high pressure switch
b) Defective LEV
12
Judgment and action
(1) Replace the outdoor inverter
p.c. board
(1) Remove obstacle
(2) Replace fan motor
(See "9-4. HOW TO CHECK THE
PARTS.")
(3) Replace outdoor inverter p.c.
board
Check the following items.
To cancel this error, turn the earth
leakage circuit breaker of the
Cylinder Unit to "OFF" and then
back "ON" again.
(1) Check the water circuit, and
correct any abnormal locations
a) Fill with water
b) Bleed air
c) Correct or replace the water
piping
d) Repair the isolating valve
e) Repair the pump valve
g) Replace the outdoor unit
(2) Check pump1 in the cylinder
unit.
a) Replace pump1
b) Replace cylinder unit board
(3) Check the discharge
temperature thermistor
a) Install the discharge tempera-
ture thermistor (TH1) to the
discharge piping
of the discharge temperature
thermistor (TH1).
(See "9-4. HOW TO CHECK THE
PARTS.")
Replace the discharge
temperature thermistor
(4) Check the LEV level.
(See "9-4. HOW TO CHECK THE
PARTS.")
a) Install LEV coil
b) Connect connector (CN724)
c) Replace LEV coil
(5) Check high pressure switch,
and repair malfunctions
a) Connect connector (CN934)
b) Repair connections
c) Replace lead wire
(6) Replace outdoor inverter p.c.
board
(7) Replace outdoor unit
Advertisement
