Hitachi RAS-2.5WHVRP User Manual

Alarm
Code
Retry
Stop
Code
YUTAKI
S/SC
YUTAKI
S80
YUTAKI
M
Origin Detail of Abnormality Main Factors
61 - (o) (o) (o) Indoor
No Cascade Messages.
Triggered in case unit is congured
to work against cascade control
and:
- No messages have been received
for 180 seconds.
- No messages have been received
from beginning of operation.
In case this alarm appears,
software stops Indoor and Outdoor
operations until communication is
restored.
Loose, disconnected, broken or
short-circuited connector
62 - (o) (o) (o) Indoor
Central mismatch.
Triggered in case YUTAKI
CASCADE CONTROLLER is
congured and they are received
central messages or central control
is congured and they are received
messages form YUTAKI CASCADE
CONTROLLER.
In case this alarm appears,
software stops Indoor and Outdoor
operations until system is properly
congured
Loose, disconnected, broken or
short-circuited connector
63 - (o) (o) (o) Communication
Transmission error between
Central and indoor communication
Indoor fuse meltdown, Indoor/
central connection wiring (breaking,
wiring error, etc.)
70 P70 o o o Indoor
Hydraulic alarm ow & Water Pump
malfunction
Water ow is not detected in the
hydraulic cycle or Pump defective
83 P83 o o o Indoor Hydraulic alarm pressure
Water pressure is not detected in
the hydraulic cycle
72 o - - Indoor Thermostat Heater Alarm
High temperature is detected in
Electric Heater
73 o o o Indoor
Mixing over-temperature limit
protection for Mixed circuit.
Circuit 2 supply temperature >
Target temperature + offset
74 P74 o o o Indoor
Unit over-temperature limit
protection
Two > Tmax +5K
75 - o o o Indoor
Freeze Protection by Cold water
inlet, outlet temperature detection
76 - o o o Indoor
Freeze Protection Stop by indoor
liquid temperature thermistor
77 - o o o Indoor-LCD Receiver Communication failure
No Opentherm/Hlink
communication for a continuous
period of 10 minutes.
78 o o o Indoor-LCD RF Communication failure
There is no communication for 1
hour with on or two RF receives
which are bound to the RF-Bridge.
79 - o o o Indoor -outdoor Unit Capacity setting Error
There is no concordance between
indoor outdoor unit capacity
80 - o o o
Indoor LCD H-link RCS transmission error No H-link communication for a
continuous period of 1 minute
between Indoor and LCD User
control by connection wiring
(breaking, wiring error, etc.)
LCD (If no H-LINK RCS has no power)
81 o o o Indoor
“Momentary Power interruption” or
“Low voltage detected”
TROUBLESHOOTING
PMML0510 rev.1 - 10/2019
146

Hitachi RAS-2.5WHVRP Specifications

General

Brand	Hitachi
Model	RAS-2.5WHVRP
Category	Heat Pump
Language	English