Hitachi UTOPIA RAS-4HVRP2E - Service and Maintenance Record Using the 7-Segment Display

11 Maintenance notes
Service and maintenance record using the 7-segment display
SMGB0136 rev.0 - 07/2021
328
11.4 Service and maintenance record using the 7-segment display
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RAS-3HVRC2
Customer’s name: Date:
Outdoor unit model (serial No. ) RAS-
1. Operation mode
2. Test run start time
3. Data collect start time
4. Read out data from
7-segment in outdoor unit
4.1 Protection control code
4.2 Total capacity of connected IU *
CP
4.3 Input/output state of outdoor micro-computer
SC
Y52C FAN1 Y21 YCH
Y20A
4.4 Alarm code for abnormal stoppage of
compressor
AC
4.5 Inverter order frequency to compressor
HI
4.6 Air ow ratio
Fo
4.7 OU expansion valve opening
eo
4.8 Temperature at the top of compressor
d
4.9 Evaporating temperature at heating
e
4.10 Ambient air temperature
o
4.11 Cause of stoppage at inverter
i
4.12 Inverter secondary current
A2
4.13 IU address
nA
4.14 IU expansion valve opening
EA
4.15 Liquid pipe temperature of IU (Freeze
protection)
LA
4.16 Cause of IU stoppage
dA
? NOTE
• OU: Outdoor Unit.
• IU: Indoor unit.
• FAN1: Constant speed fan.
• Y52C: Compressor operation.
• Y21: Reversing valve (RVR).
• YCH: Oil heater.
• Y20A: Gas Bypass Circuit for Startup
• *: Multiply 1/8 by the code on the 7-segment.