Hitachi SAMURAI Series Service Manual page 114

4 Troubleshooting
Troubleshooting by alarm code
14-14
Alarm code
C1-14
Alarm stop reason
Outlet water temperature exceeds 62ºC during compressor operation.
PCBc (CPU PCB) PCN13 short line is disconnected
?
N O T E
" 14-14 " in case that PCN13 short line is disconnected
" C1-14 " in case of detection by outlet water temperature thermistor
PCB monitoring position
PCBc (CPU PCB) CN5 (Outlet water temperature thermistor Two1(for water temperature control))
PCBc (CPU PCB) PCN13 (Short line)
Outlet water
temperature increased
over 62ºC during compressor
operation. (Confirmed from
data immediately before)
The connection and
insertion of connector
CN5 in PCBc (CPU PCB)
are correct
Remove the
connectors and
measure thermistor resistance.
Is resistance value
normal?
Check PCBc (CPU PCB)
?
N O T E
• Hot water overincrease is detected by the outlet water temperature thermistor for water temperature control.
• The relation between detected thermistor and alarm indication, as well as their connected PCB codes are shown in the table below.
Abnormality code
C1-14
106 SMGB0120 rev.0 - 11/2017
Hot Water Over-Increase
Yes
No
No
Yes
No
Yes
Detected thermistor
Outlet water temperature thermistor Two1
Adjustment of water amount (inlet-outlet
Clogging of water strainer
Adjustment of reverse rotation of pump
Adjustment of cold water thermo setting
value. Shall be within usage range
Clogging of water side heat exchanger
Correction of
connections
Replace thermistor
PCB code
water temperature)
Connector code
PCBc CN5