Toshiba Estia RUA-CP1701H, Service Manual

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Monobloc Outdoor Unit Service Manual
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“ON” on the remote controller will not operate the compressor.
(It will not operate even after the reboot delay timer elapsed) When the outdoor temperature (TO sensor detection
temperature) is -25 °C or lower, the heat pump will not operate
in order to protect the compressor, and the heater will operate
instead.
5
When the power is turned on, it starts operation without
operating the remote controller. • The auto restart operation may be working.
• The antifreeze operation may be working.
• If the TWI, TWO or THO sensor detects a temperature
below 4 °C, the operation changes from circulating pump
--->> circulating pump + heater.)
9.3. Outline of the determination diagram
The first determination of whether a defective part is in the Monobloc outdoor unit can be performed by the following
method.
9.3.1. Procedure of defect diagnosis
In the case of a defect, please apply the following procedure in order to find the defective part.
9.3.2. How to determine the Alarm on the remote controller
Alarms are used to inform you of the failure of one of the parts of the heat pump or chiller system.
In the case of an alarm, the alarm icon is displayed on the RC:
Steady icon: Alarm condition detected; the unit has stopped
Flashing icon: Alarm condition detected; the unit is running
To see the alarms
1.
Press and hold the Mode key and the Schedule key
simultaneously for 2 seconds.
2.
The alarms menu will be displayed.
3.
Press the Down key or the Up key to display the alarms (1 to 5).
Two types of alarms are displayed: Current alarms (C-X) / Past alarms
(P-X).
Examples:
Current Alarm C1 Past Alarm P1
Alarm Code 16 Alarm Code 15
Defect
Confirm the check
code on the remote
controller display
Check code
???
Check information and
cause / result