Toshiba Estia RUA-CP1701H, Service Manual

Page: 59 / 164

Monobloc Outdoor Unit Service Manual
58
8.3.2. CAPACITY OVERRIDE [P064]
# Override Conditions Action
0
No override N.A. No action
1 Power Up Delay Unit is powered on
Wait for 90 seconds before starting the
compressor
2
Minimum on time
(compressor short cycle
protection)
Compressor is running for less than 3
minutes. Do not allow compressor stopping, run
at minimum frequency
3
Minimum off time
(compressor short cycle
protection)
Compressor is stopped for less than 2
minutes and 30 seconds
Do not allow compressor starting
4 Mode Change Delay Operating Mode is changed
Wait for 30 seconds before starting the
compressor
5 Starting Sequence Step 1 Compressor is starting
Limit maximum Compressor
frequency
6 Starting Sequence Step 2 Compressor is starting
Limit maximum Compressor
frequency
7
Starting Sequence Step 3 Compressor is starting
Limit maximum Compressor
frequency
8
Starting Sequence Step 4
Compressor is starting
Limit maximum Compressor
frequency
9
Compressor Stopping
Delay
Compressor is requested to stop and
current capacity is greater than 1%
Run the compressor at minimum
frequency for 30 seconds
10 No override N.A. No action
20
Defrost Unit is defrosting No action, monitoring only
39
Minimum OAT in Heating
Heat Mode and TO2 [P039] is below
“oat_min” parameter ([P514], default is
-20°C)
Do not allow the start or stop unit if
already running
40 Maximum OAT in Heating
Heat Mode requested and TO2 is
above “oat_max” parameter ([P515],
default is 30°C, max limit is 99°C).
Do not allow the start or stop unit if
already running.
41
Maximum EWT in Heating
Unit running and EWT is above 59°C
(17kW) or 56°C (21 kW) or unit
stopped and EWT is above 52°C
(17kW) or 49°C (21kW).
Do not allow the start or stop the
compressor if already running
42 Low OAT in Heating
Units 17 and 21 kW running in Heat
Mode and TO2 [P039] ≤-10°C.
Reduce maximum compressor
frequency to 70 Hz (17 and 21 kW)
43 Very Low OAT in Heating
Units 17 and 21 kW running in Heat
Mode and TO2 [P039] ≤ -15°C.
Reduce maximum compressor
frequency to 60 Hz (17 and 21 kW)
44 High OAT in Heating
Units 17 and 21 kW, Heat Mode
requested and TO2 > 30°C. Do not allow the compressor start or
stop it if already running.
45
High LWT Threshold #1 in
Heating
Units 17 and 21 kW, Heat Mode, TO2
[P039] above 11°C and LWT above
High Temperature Protection threshold
#1 (42°C).
Reduce compressor frequency
range between 45 and 90 Hz
46
High LWT Threshold #2 in
Heating
Units 17 and 21 kW, Heat Mode, TO2
[P039] above 11°C and LWT above
High Temperature Protection threshold
#2 (53°C).
Reduce compressor frequency
range between 45 and 70 Hz
47
High LWT Threshold #3 in
Heating
Units 17 and 21 kW, Heat Mode, TO2
[P039] above 11°C and LWT above
High Temperature Protection threshold
#3 (55°C).
Reduce compressor frequency
range between 30 and 50 Hz
48
High LWT Threshold #4 in
Heating
Units 17 and 21 kW, Heat Mode and
LWT above High Temperature
Protection threshold #4 (55°C).
Reduce maximum compressor
frequency to 80 Hz.