Hitachi RAC-25FXA RAC25FXA User Manual

Hitachi

Product codes

RAC25FXA

TROUBLESHOOTING

14-1

14 TROUBLESHOOTING

CONTENTS

TROUBLESHOOTING ___________________________________________________ 14-1

PRECAUTIONS FOR TROUBLE SHOOTING _________________________________ 14-3

MONOZONE RAC-25NPA / 35NPA / 50NPA _________________________________ 14-3

MULTIZONE RAM-36NP2A _______________________________________________ 14-3

MULTIZONE/MONO SPLIT RAM-53NP2A / 53NP3A / 68NP3A / 70NP4A , MONO
SPLIT RAF-50PXA/RAC-50FXA ___________________________________________ 14-4

MULTIZONE RAM-90NP5A _______________________________________________ 14-4

MULTIZONE RAM-130NP6A ______________________________________________ 14-5

MONO SPLIT RAK-18/25/35PSA / RAC-18/25/35WSA , RAK-18/25/35PSAN / RAC-
18/25/35WSAN , RAK-18/25/35PSPA / RAC-18/25/35WSPA _____________________ 14-5

MONO SPLIT RAK-18/25/35PPA / RAC-18/25/35WPA , RAK-18/25/35/50PEA / RAC-
18/25/35/50WEA , RAF-25/35RPA / RAC-25/35FPA ____________________________ 14-6

MONO SPLIT RAK-50/60/70PPA / RAC-50/60/70WPA__________________________ 14-6

MONO SPLIT RAF-50RPA / RAC-50FPA ____________________________________ 14-7

MONO SPLIT RAF-25/35PXA / RAC-25/35FXA _______________________________ 14-7

MONO SPLIT RAD-50/60/70PPA / RAC-50/60/70DPA __________________________ 14-8

DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER
CIRCUIT ______________________________________________________________ 14-9

MONOZONE RAC-25NPA / 35NPA / 50NPA & MULTIZONE RAM-36NP2A / 53NP2A /
53NP3A / 68NP3A / 70NP4A / 130NP6A & MONO SPLIT RAF-50PXA / RAC-50FXA,
RAD-50/60/70PPA / RAC-50/60/70DPA _____________________________________ 14-9

MULTIZONE RAM-90NP5A _______________________________________________ 14-9

MONO SPLIT RAK-18/25/35PSA / RAC-18/25/35WSA, RAK-18/25/35PSAN / RAC-
18/25/35WSAN , RAK-18/25/35PSPA / RAC-18/25/35WSPA ____________________ 14-10

MONO SPLIT RAK-18/25/35PPA / RAC-18/25/35WPA, RAK-18/25/35/50PEA / RAC-
18/25/35/50WEA , RAF-25/35PXA / RAC-25/35FXA RAF-50RPA / RAC-50FPA _____ 14-10

MONO SPLIT RAK-50/60/70PPA / RAC-50/60/70WPA_________________________ 14-11

MONO SPLIT RAF-25/35RPA / RAC-25/35FPA ______________________________ 14-11

PRELIMINARY CHECK ON INDOOR/OUTDOOR UNIT ELECTRICAL PARTS AND
REFRIGERATING ______________________________________________________ 14-12

Support Function of Failure Diagnosis ______________________________________ 14-13

CHECKING THE INDOOR UNIT ELECTRICAL PARTS _________________________ 14-14

No power is detected (no operation) _______________________________________ 14-14

Indoor fan does not operate (others are normal) – RAK-25/35/50PXA, RAK-
18/25/35/50/70PPA, RAK-18/25/35/50PEA, RAF-25/35/50RPA, RAF-25/35/50PXA,
RAD-50/60/70PPA _____________________________________________________ 14-16

Air deflector does not move (others are normal) ______________________________ 14-16

Check the control P.W.B. (power circuit) – RAK-25/35PXA, RAK-18/25/35PPA, RAK-
18/25/35/50PEA, RAF-25/35/50RPA, RAF-25/35PXA __________________________ 14-16

Checking the remote controller ____________________________________________ 14-17

Outdoor unit does not operate (but receives remote infrared signal) _______________ 14-17

All systems stop from several seconds to several minutes after operation is started (all
indicators are also off) __________________________________________________ 14-18

CHECKING OUTDOOR UNIT ELECTRICAL PARTS ___________________________ 14-19

No operation or abnormal operation (RAC-18/25/35WPA, RAC-18/25/35/50WEA, RAC-
25/35FPA, RAC-25/35FXA _______________________________________________ 14-19

No operation or abnormal operation (RAC-18/25/35WSA, RAC-25/35/50WXA, RAC-
50/60/70WPA, RAC-50FPA, RAC-50FXA, RAC-50/60/70DPA ___________________ 14-21

CHECKING BETWEEN GAS LEAKAGE AND COMPRESSOR FAULTY ___________ 14-24

Troubleshooting procedure (No operation, No heating or No cooling) ______________ 14-24

TROUBLESHOOTING WHEN INDOOR TIMER LAMP BLINKS __________________ 14-25

MONOZONE / MULTIZONE indoor ________________________________________ 14-25

MONO SPLIT INDOOR (RAK-25/35PXA, RAK-18/25/35/50/60/70PPA, RAK-
18/25/35/50PEA, RAF-25/35/50RPA) ______________________________________ 14-26

MONO SPLIT INDOOR (RAK-18/25/35PSA, RAK-18/25/35PSAn, RAK-18/25/35PSPA)14-27

MONO SPLIT INDOOR (RAK-50PXA) ______________________________________ 14-28

MONO SPLIT INDOOR (RAF-25/35/50PXA) _________________________________ 14-29

MONO SPLIT INDOOR (RAD-50/60/70PPA) _________________________________ 14-30

TROUBLESHOOTING WHEN OUTDOOR LED LAMP BLINKS ___________________ 14-31

MONOZONE RAC-25NPA / 35NPA / 50NPA ________________________________ 14-31